X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fpapers%2Fmatita%2Fklunamed.bst;fp=helm%2Fpapers%2Fmatita%2Fklunamed.bst;h=716c456983f9d30ec7bd867e4079c76d944e3cfb;hb=d9f9d2b28788192dfc5b9d156c5f864648e87bd3;hp=0000000000000000000000000000000000000000;hpb=383c0e6ff61664272e765bb05eb10565b66c5587;p=helm.git

diff --git a/helm/papers/matita/klunamed.bst b/helm/papers/matita/klunamed.bst
new file mode 100644
index 000000000..716c45698
--- /dev/null
+++ b/helm/papers/matita/klunamed.bst
@@ -0,0 +1,1161 @@
+% This style produces citations in the `author-year' format.
+% It supports two forms of citation: the \cite command produces:  (Author, year)
+% in the text; the \cite* command only:  (year) .
+
+ 
+ENTRY
+  { address
+    author
+    booktitle
+    chapter
+    edition
+    editor
+    howpublished
+    institution
+    journal
+    key
+    note
+    number
+    organization
+    pages
+    publisher
+    school
+    series
+    title
+    type
+    volume
+    year
+  }
+  {}
+  { label extra.label sort.label }
+ 
+INTEGERS { output.state before.all mid.sentence after.sentence after.block }
+ 
+FUNCTION {init.state.consts}
+{ #0 'before.all :=
+  #1 'mid.sentence :=
+  #2 'after.sentence :=
+  #3 'after.block :=
+}
+ 
+STRINGS { s t }
+ 
+FUNCTION {output.nonnull}
+{ 's :=
+  output.state mid.sentence =
+    { ", " * write$ }
+    { output.state after.block =
+        { add.period$ write$
+          newline$
+          "\newblock " write$
+        }
+        { output.state before.all =
+            'write$
+            { add.period$ " " * write$ }
+          if$
+        }
+      if$
+      mid.sentence 'output.state :=
+    }
+  if$
+  s
+}
+ 
+FUNCTION {output.nonnull.extra}
+{ 's :=
+  output.state mid.sentence =
+    { " " * write$ }
+    { output.state after.block =
+        { add.period$  write$
+          newline$
+          "\newblock " write$
+        }
+        { output.state before.all =
+            'write$
+            { add.period$ " " * write$ }
+          if$
+        }
+      if$
+      mid.sentence 'output.state :=
+    }
+  if$
+  s
+}
+ 
+FUNCTION {output}
+{ duplicate$ empty$
+    'pop$
+    'output.nonnull
+  if$
+}
+ 
+FUNCTION {output.extra}
+{ duplicate$ empty$
+    'pop$
+    'output.nonnull.extra
+  if$
+}
+ 
+FUNCTION {output.check}
+{ 't :=
+  duplicate$ empty$
+    { pop$ "empty " t * " in " * cite$ * warning$ }
+    'output.nonnull
+  if$
+}
+ 
+FUNCTION {output.check.extra}
+{ 't :=
+  duplicate$ empty$
+    { pop$ "empty " t * " in " * cite$ * warning$ }
+    'output.nonnull.extra
+  if$
+}
+ 
+FUNCTION {output.year.check}
+{ year empty$
+    { "empty year in " cite$ * warning$ }
+    { write$
+      ": " year * extra.label * 
+      mid.sentence 'output.state :=
+    }
+  if$
+}
+ 
+FUNCTION {output.bibitem}
+{ newline$
+  "\bibitem[" write$
+  label write$
+  "]{" write$
+  cite$ write$
+  "}" write$
+  newline$
+  ""
+  before.all 'output.state :=
+}
+ 
+FUNCTION {fin.entry}
+{ add.period$
+  write$
+  newline$
+}
+ 
+FUNCTION {new.block}
+{ output.state before.all =
+    'skip$
+    { after.block 'output.state := }
+  if$
+}
+ 
+FUNCTION {new.sentence}
+{ output.state after.block =
+    'skip$
+    { output.state before.all =
+        'skip$
+        { after.sentence 'output.state := }
+      if$
+    }
+  if$
+}
+ 
+FUNCTION {not}
+{   { #0 }
+    { #1 }
+  if$
+}
+ 
+FUNCTION {and}
+{   'skip$
+    { pop$ #0 }
+  if$
+}
+ 
+FUNCTION {or}
+{   { pop$ #1 }
+    'skip$
+  if$
+}
+ 
+FUNCTION {new.block.checkb}
+{ empty$
+  swap$ empty$
+  and
+    'skip$
+    'new.block
+  if$
+}
+ 
+FUNCTION {field.or.null}
+{ duplicate$ empty$
+    { pop$ "" }
+    'skip$
+  if$
+}
+ 
+FUNCTION {boldface}
+{ duplicate$ empty$
+    { pop$ "" }
+    { "{\bf " swap$ * "}" * }
+  if$
+}
+ 
+FUNCTION {emphasize}
+{ duplicate$ empty$
+    { pop$ "" }
+    { "{\em " swap$ * "}" * }
+  if$
+}
+ 
+INTEGERS { nameptr namesleft numnames }
+ 
+FUNCTION {format.names}
+{ 's :=
+  #1 'nameptr :=
+  s num.names$ 'numnames :=
+  numnames 'namesleft :=
+    { namesleft #0 > }
+    { nameptr #1 >
+        { s nameptr "{f. }{vv~}{ll}{, jj}" format.name$ 't := }
+        { s nameptr "{vv~}{ll}{, jj}{, f.}" format.name$ 't := }
+      if$
+      nameptr #1 >
+        { namesleft #1 >
+            { ", " * t * }
+            { numnames #2 >
+                { "," * }
+                'skip$
+              if$
+              t "others" =
+                { " et~al." * }
+                { " and " * t * }
+              if$
+            }
+          if$
+        }
+        't
+      if$
+      nameptr #1 + 'nameptr :=
+      namesleft #1 - 'namesleft :=
+    }
+  while$
+}
+ 
+FUNCTION {format.ed.names}
+{ 's :=
+  #1 'nameptr :=
+  s num.names$ 'numnames :=
+  numnames 'namesleft :=
+    { namesleft #0 > }
+    { nameptr #1 >
+        { s nameptr "{f. }{vv~}{ll}{, jj}" format.name$ 't := }
+        { s nameptr "{f. }{vv~}{ll}{, jj}" format.name$ 't := }
+      if$
+      nameptr #1 >
+        { namesleft #1 >
+            { ", " * t * }
+            { numnames #2 >
+                { "," * }
+                'skip$
+              if$
+              t "others" =
+                { " et~al." * }
+                { " and " * t * }
+              if$
+            }
+          if$
+        }
+        't
+      if$
+      nameptr #1 + 'nameptr :=
+      namesleft #1 - 'namesleft :=
+    }
+  while$
+}
+
+FUNCTION {format.authors}
+{ author empty$
+    { "" }
+    { author format.names }
+  if$
+}
+ 
+FUNCTION {format.key}
+{ empty$
+    { key field.or.null }
+    { "" }
+  if$
+}
+
+FUNCTION {format.editors}
+{ editor empty$
+    { "" }
+    { editor format.names
+      editor num.names$ #1 >
+        { " (eds.)" * }
+        { " (ed.)" * }
+      if$
+    }
+  if$
+}
+ 
+FUNCTION {format.editors.extra}
+{ editor empty$
+    { "" }
+    { editor format.ed.names
+      editor num.names$ #1 >
+        { " (eds.)" * }
+        { " (ed.)" * }
+      if$
+    }
+  if$
+}
+ 
+FUNCTION {format.title}
+{ title empty$
+    { "" }
+    { "`" title "'" * * }
+  if$
+}
+ 
+FUNCTION {n.dashify}
+{ 't :=
+  ""
+    { t empty$ not }
+    { t #1 #1 substring$ "-" =
+        { t #1 #2 substring$ "--" = not
+            { "--" *
+              t #2 global.max$ substring$ 't :=
+            }
+            {   { t #1 #1 substring$ "-" = }
+                { "-" *
+                  t #2 global.max$ substring$ 't :=
+                }
+              while$
+            }
+          if$
+        }
+        { t #1 #1 substring$ *
+          t #2 global.max$ substring$ 't :=
+        }
+      if$
+    }
+  while$
+}
+ 
+FUNCTION {first.page.number}
+{ 't :=
+  ""
+    { t "" =
+        { #0 }
+        { t #1 #1 substring$ "-" = not }
+      if$
+    }
+    { t #1 #1 substring$ *
+      t #2 global.max$ substring$ 't :=
+    }
+  while$
+}
+
+FUNCTION {format.btitle}
+{ title emphasize
+}
+ 
+FUNCTION {tie.or.space.connect}
+{ duplicate$ text.length$ #3 <
+    { "~" }
+    { " " }
+  if$
+  swap$ * *
+}
+ 
+FUNCTION {either.or.check}
+{ empty$
+    'pop$
+    { "can't use both " swap$ * " fields in " * cite$ * warning$ }
+  if$
+}
+ 
+FUNCTION {format.bvolume}
+{ volume empty$
+    { "" }
+    { "Vol." volume tie.or.space.connect
+      series empty$
+        'skip$
+        { " of " * series emphasize * }
+      if$
+      "volume and number" number either.or.check
+    }
+  if$
+}
+ 
+FUNCTION {format.number.series}
+{ volume empty$
+    { number empty$
+        { series field.or.null }
+        { output.state mid.sentence =
+            { "No." }
+            { "No." }
+          if$
+          number tie.or.space.connect
+          series empty$
+            { "there's a number but no series in " cite$ * warning$ }
+            { " in " * series * }
+          if$
+        }
+      if$
+    }
+    { "" }
+  if$
+}
+ 
+FUNCTION {format.edition}
+{ edition empty$
+    { "" }
+    { output.state mid.sentence =
+        { edition "l" change.case$ " edition" * }
+        { edition "t" change.case$ " edition" * }
+      if$
+    }
+  if$
+}
+ 
+INTEGERS { multiresult }
+ 
+FUNCTION {multi.page.check}
+{ 't :=
+  #0 'multiresult :=
+    { multiresult not
+      t empty$ not
+      and
+    }
+    { t #1 #1 substring$
+      duplicate$ "-" =
+      swap$ duplicate$ "," =
+      swap$ "+" =
+      or or
+        { #1 'multiresult := }
+        { t #2 global.max$ substring$ 't := }
+      if$
+    }
+  while$
+  multiresult
+}
+ 
+FUNCTION {format.pages}
+{ pages empty$
+    { "" }
+    { pages multi.page.check
+        { "pp." pages n.dashify tie.or.space.connect }
+        { "p." pages tie.or.space.connect }
+      if$
+    }
+  if$
+}
+
+FUNCTION {format.page}
+{ pages empty$
+    { "" }
+    { "p.~" pages first.page.number * }
+  if$
+}
+
+FUNCTION {format.vol.num.pages}
+{ volume field.or.null
+  volume empty$
+    'skip$
+    { boldface }
+  if$
+  number empty$
+    'skip$
+    { "(" number * ")" * *
+      volume empty$
+        { "there's a number but no volume in " cite$ * warning$ }
+        'skip$
+      if$
+    }
+  if$
+  pages empty$
+    'skip$
+    { duplicate$ empty$
+        { pop$ format.pages }
+        { ", " * pages n.dashify * }
+      if$
+    }
+  if$
+}
+
+FUNCTION {format.vol.num.page}
+{ volume field.or.null
+  volume empty$
+    'skip$
+    { boldface }
+  if$
+  number empty$
+    'skip$
+    { "(" number * ")" * *
+      volume empty$
+        { "there's a number but no volume in " cite$ * warning$ }
+        'skip$
+      if$
+    }
+  if$
+  pages empty$
+    'skip$
+    { duplicate$ empty$
+        { pop$ format.pages }
+        { ", " * pages first.page.number * }
+      if$
+    }
+  if$
+}
+
+FUNCTION {format.chapter.pages}
+{ chapter empty$
+    'format.pages
+    { type empty$
+        { "Chapt." }
+        { type "l" change.case$ }
+      if$
+      chapter tie.or.space.connect
+      pages empty$
+        'skip$
+        { ", " * format.pages * }
+      if$
+    }
+  if$
+}
+ 
+FUNCTION {format.in.ed.booktitle}
+{ booktitle empty$
+    { "" }
+    { editor empty$
+        { "In: " booktitle emphasize * }
+        { "In: " format.editors.extra * ": " * booktitle emphasize * }
+      if$
+    }
+  if$
+}
+ 
+FUNCTION {format.in.booktitle.or.series}
+{ booktitle empty$
+    { series empty$
+        { "" }
+        { "In: " series emphasize * }
+      if$
+    }
+    { editor empty$
+        { "In: " booktitle emphasize * }
+        { "In: " format.editors.extra * ": " * booktitle emphasize * }
+      if$ 
+    }
+  if$
+}
+ 
+FUNCTION {format.thesis.type}
+{ type empty$
+    'skip$
+    { pop$
+      type "t" change.case$
+    }
+  if$
+}
+ 
+FUNCTION {format.tr.number}
+{ type empty$
+    { "Technical Report" }
+    'type
+  if$
+  number empty$
+    { "t" change.case$ }
+    { number tie.or.space.connect }
+  if$
+}
+ 
+FUNCTION {format.article.crossref}
+{ "in"
+  " \cite{" * crossref * "}" *
+}
+ 
+FUNCTION {format.book.crossref}
+{ volume empty$
+    { "empty volume in " cite$ * "'s crossref of " * crossref * warning$
+      "in "
+    }
+    { "Vol." volume tie.or.space.connect
+      " of " *
+    }
+  if$
+  "\cite{" * crossref * "}" *
+}
+ 
+FUNCTION {format.incoll.inproc.crossref}
+{ "in"
+  " \cite{" * crossref * "}" *
+}
+ 
+FUNCTION {article}
+{ output.bibitem
+  format.authors "author" output.check
+  author format.key output
+  output.year.check
+  format.title "title" output.check
+  new.block
+  crossref missing$
+    { journal emphasize "journal" output.check.extra
+      format.vol.num.pages output.extra
+    }
+    { format.article.crossref output.nonnull
+      format.pages output
+    }
+  if$
+  new.block
+  note output
+  fin.entry
+}
+ 
+FUNCTION {book}
+{ output.bibitem
+  author empty$
+    { format.editors "author and editor" output.check
+      editor format.key output
+    }
+    { format.authors output.nonnull
+      crossref missing$
+        { "author and editor" editor either.or.check }
+        'skip$
+      if$
+    }
+  if$
+  output.year.check
+  format.btitle "title" output.check
+  crossref missing$
+    { format.bvolume output
+      format.number.series output
+      new.block
+      address empty$
+        'skip$
+        { address ":" * output }
+      if$
+      publisher "publisher" output.check.extra
+    }
+    { new.block
+      format.book.crossref output.nonnull
+    }
+  if$
+  format.edition output
+  new.block
+  note output
+  fin.entry
+}
+ 
+FUNCTION {booklet}
+{ output.bibitem
+  format.authors output
+  author format.key output
+  output.year.check
+  format.btitle "title" output.check
+  new.block
+  howpublished output
+  address output
+  new.block
+  note output
+  fin.entry
+}
+ 
+FUNCTION {inbook}
+{ output.bibitem
+  author empty$
+    { format.editors "author and editor" output.check
+      editor format.key output
+    }
+    { format.authors output.nonnull
+      crossref missing$
+        { "author and editor" editor either.or.check }
+        'skip$
+      if$
+    }
+  if$
+  output.year.check
+  format.btitle "title" output.check
+  crossref missing$
+    { format.bvolume output
+      format.chapter.pages "chapter and pages" output.check
+      format.number.series output
+      new.block
+      address empty$
+        'skip$
+        { address ":" * output }
+      if$
+      publisher "publisher" output.check.extra
+    }
+    { format.chapter.pages "chapter and pages" output.check
+      new.block
+      format.book.crossref output.nonnull
+    }
+  if$
+  format.edition output
+  new.block
+  note output
+  fin.entry
+}
+ 
+FUNCTION {incollection}
+{ output.bibitem
+  format.authors "author" output.check
+  author format.key output
+  output.year.check
+  format.title "title" output.check
+  new.block
+  crossref missing$
+    { format.in.ed.booktitle "booktitle" output.check
+      format.bvolume output
+      format.number.series output
+      new.block
+      address empty$
+        'skip$
+        { address ":" * output }
+      if$
+      publisher "publisher" output.check.extra
+      format.edition output
+      format.chapter.pages output
+    }
+    { format.incoll.inproc.crossref output.nonnull
+      format.chapter.pages output
+    }
+  if$
+  new.block
+  note output
+  fin.entry
+}
+ 
+FUNCTION {inproceedings}
+{ output.bibitem
+  format.authors "author" output.check
+  author format.key output
+  output.year.check
+  format.title "title" output.check
+  new.block
+  crossref missing$
+    { format.in.booktitle.or.series "booktitle or series" output.check
+      format.bvolume output
+      new.sentence
+      address output
+      format.pages output
+    }
+    { format.incoll.inproc.crossref output.nonnull
+      format.pages output
+    }
+  if$
+  new.block
+  note output
+  fin.entry
+}
+ 
+FUNCTION {conference} { inproceedings }
+ 
+FUNCTION {manual}
+{ output.bibitem
+  format.authors output
+  author format.key output
+  output.year.check
+  format.title "title" output.check
+  new.block
+  organization output
+  address output
+  format.edition output
+  new.block
+  note output
+  fin.entry
+}
+ 
+FUNCTION {mastersthesis}
+{ output.bibitem
+  format.authors "author" output.check
+  author format.key output
+  output.year.check
+  format.title "title" output.check
+  new.block
+  "Master's thesis" format.thesis.type output.nonnull
+  school "school" output.check
+  address output
+  new.block
+  note output
+  fin.entry
+}
+ 
+FUNCTION {misc}
+{ output.bibitem
+  format.authors output
+  author format.key output
+  output.year.check
+  format.title output
+  new.block
+  howpublished output
+  new.block
+  note output
+  fin.entry
+}
+ 
+FUNCTION {phdthesis}
+{ output.bibitem
+  format.authors "author" output.check
+  author format.key output
+  output.year.check
+  format.title "title" output.check
+  new.block
+  "Ph.D. thesis" format.thesis.type output.nonnull
+  school "school" output.check
+  address output
+  new.block
+  note output
+  fin.entry
+}
+ 
+FUNCTION {proceedings}
+{ output.bibitem
+  format.editors output
+  editor format.key output
+  output.year.check
+  format.title "title" output.check
+  format.bvolume output
+  format.number.series output
+  new.block
+  address empty$
+     'skip$
+     { address ":" * output }
+  if$
+  organization output.extra
+  publisher output
+  new.block
+  note output
+  fin.entry
+}
+ 
+FUNCTION {techreport}
+{ output.bibitem
+  format.authors "author" output.check
+  author format.key output
+  output.year.check
+  format.title "title" output.check
+  new.block
+  format.tr.number output.nonnull
+  institution "institution" output.check
+  address output
+  new.block
+  note output
+  fin.entry
+}
+ 
+FUNCTION {unpublished}
+{ output.bibitem
+  format.authors "author" output.check
+  author format.key output
+  output.year.check
+  format.title "title" output.check
+  new.block
+  note "note" output.check
+  fin.entry
+}
+ 
+FUNCTION {default.type} { misc }
+
+MACRO {jan} {"Jan."}
+
+MACRO {feb} {"Feb."}
+
+MACRO {mar} {"Mar."}
+
+MACRO {apr} {"Apr,"}
+
+MACRO {may} {"May"}
+
+MACRO {jun} {"June"}
+
+MACRO {jul} {"July"}
+
+MACRO {aug} {"Aug."}
+
+MACRO {sep} {"Sept."}
+
+MACRO {oct} {"Oct."}
+
+MACRO {nov} {"Nov."}
+
+MACRO {dec} {"Dec."}
+
+READ
+ 
+FUNCTION {sortify}
+{ purify$
+  "l" change.case$
+}
+ 
+INTEGERS { len }
+ 
+FUNCTION {chop.word}
+{ 's :=
+  'len :=
+  s #1 len substring$ =
+    { s len #1 + global.max$ substring$ }
+    's
+  if$
+}
+ 
+FUNCTION {format.lab.names}
+{ 's :=
+  s #1 "{vv~}{ll}" format.name$
+  s num.names$ duplicate$
+  #2 >
+    { pop$ " et~al." * }
+    { #2 <
+        'skip$
+        { s #2 "{ff }{vv }{ll}{ jj}" format.name$ "others" =
+            { " et~al." * }
+            { " and " * s #2 "{vv~}{ll}" format.name$ * }
+          if$
+        }
+      if$
+    }
+  if$
+}
+ 
+FUNCTION {author.key.label}
+{ author empty$
+    { key empty$
+        { cite$ #1 #3 substring$ }
+        'key
+      if$
+    }
+    { author format.lab.names }
+  if$
+}
+ 
+FUNCTION {author.editor.key.label}
+{ author empty$
+    { editor empty$
+        { key empty$
+            { cite$ #1 #3 substring$ }
+            'key
+          if$
+        }
+        { editor format.lab.names }
+      if$
+    }
+    { author format.lab.names }
+  if$
+}
+ 
+FUNCTION {editor.key.label}
+{ editor empty$
+    { key empty$
+        { cite$ #1 #3 substring$ }
+        'key
+      if$
+    }
+    { editor format.lab.names }
+  if$
+}
+ 
+FUNCTION {calc.label}
+{ type$ "book" =
+  type$ "inbook" =
+  or
+    'author.editor.key.label
+    { type$ "proceedings" =
+        'editor.key.label
+        'author.key.label
+      if$
+    }
+  if$
+  "\protect\citeauthoryear{" swap$ * "}{"
+  *
+  year field.or.null purify$ #-1 #4 substring$
+  *
+  'label :=
+}
+ 
+FUNCTION {sort.format.names}
+{ 's :=
+  #1 'nameptr :=
+  ""
+  s num.names$ 'numnames :=
+  numnames 'namesleft :=
+    { namesleft #0 > }
+    { nameptr #1 >
+        { "   " * }
+        'skip$
+      if$
+      s nameptr "{vv{ } }{ll{ }}{  f{ }}{  jj{ }}" format.name$ 't :=
+      nameptr numnames = t "others" = and
+        { "et al" * }
+        { t sortify * }
+      if$
+      nameptr #1 + 'nameptr :=
+      namesleft #1 - 'namesleft :=
+    }
+  while$
+}
+ 
+FUNCTION {sort.format.title}
+{ 't :=
+  "A " #2
+    "An " #3
+      "The " #4 t chop.word
+    chop.word
+  chop.word
+  sortify
+  #1 global.max$ substring$
+}
+ 
+FUNCTION {author.sort}
+{ author empty$
+    { key empty$
+        { "to sort, need author or key in " cite$ * warning$
+          ""
+        }
+        { key sortify }
+      if$
+    }
+    { author sort.format.names }
+  if$
+}
+ 
+FUNCTION {author.editor.sort}
+{ author empty$
+    { editor empty$
+        { key empty$
+            { "to sort, need author, editor, or key in " cite$ * warning$
+              ""
+            }
+            { key sortify }
+          if$
+        }
+        { editor sort.format.names }
+      if$
+    }
+    { author sort.format.names }
+  if$
+}
+ 
+FUNCTION {editor.sort}
+{ editor empty$
+    { key empty$
+        { "to sort, need editor or key in " cite$ * warning$
+          ""
+        }
+        { key sortify }
+      if$
+    }
+    { editor sort.format.names }
+  if$
+}
+ 
+FUNCTION {presort}
+{ calc.label
+  label sortify
+  "    "
+  *
+  type$ "book" =
+  type$ "inbook" =
+  or
+    'author.editor.sort
+    { type$ "proceedings" =
+        'editor.sort
+        'author.sort
+      if$
+    }
+  if$
+  #1 entry.max$ substring$
+  'sort.label :=
+  sort.label
+  *
+  "    "
+  *
+  title field.or.null
+  sort.format.title
+  *
+  #1 entry.max$ substring$
+  'sort.key$ :=
+}
+ 
+ITERATE {presort}
+ 
+SORT            % by label, sort.label, title---for final label calculation
+ 
+STRINGS { last.label next.extra }
+ 
+INTEGERS { last.extra.num }
+ 
+FUNCTION {initialize.extra.label.stuff}
+{ #0 int.to.chr$ 'last.label :=
+  "" 'next.extra :=
+  #0 'last.extra.num :=
+}
+ 
+FUNCTION {forward.pass}
+{ last.label label =
+    { last.extra.num #1 + 'last.extra.num :=
+      last.extra.num int.to.chr$ 'extra.label :=
+    }
+    { "a" chr.to.int$ 'last.extra.num :=
+      "" 'extra.label :=
+      label 'last.label :=
+    }
+  if$
+}
+ 
+FUNCTION {reverse.pass}
+{ next.extra "b" =
+    { "a" 'extra.label := }
+    'skip$
+  if$
+  label extra.label * "}" * 'label :=
+  extra.label 'next.extra :=
+}
+ 
+EXECUTE {initialize.extra.label.stuff}
+ 
+ITERATE {forward.pass}
+ 
+REVERSE {reverse.pass}
+ 
+FUNCTION {bib.sort.order}
+{ sort.label
+  "    "
+  *
+  year field.or.null sortify
+  *
+  "    "
+  *
+  title field.or.null
+  sort.format.title
+  *
+  #1 entry.max$ substring$
+  'sort.key$ :=
+}
+ 
+ITERATE {bib.sort.order}
+ 
+SORT            % by sort.label, year, title---giving final bibliography order
+ 
+FUNCTION {begin.bib}
+{ preamble$ empty$
+    'skip$
+    { preamble$ write$ newline$ }
+  if$
+  "\begin{thebibliography}{}" write$ newline$
+}
+ 
+EXECUTE {begin.bib}
+ 
+EXECUTE {init.state.consts}
+ 
+ITERATE {call.type$}
+ 
+FUNCTION {end.bib}
+{ newline$
+  "\end{thebibliography}" write$ newline$
+}
+ 
+EXECUTE {end.bib}
+