@incollection{lambdadelta7,
   author="F. {Guidi}", 
   title="{An Efficient Validation Procedure for the Formal System $\lambda\delta$}",
   publisher="Centre for Applied Mathematics and Information Technology, Department of Mathematics, University of Azores",
   address="Ponta Delgada, Portugal",
   editor="F. {Ferreira} and H. {Guerra} and E. {Mayordomo} and J. {Rasga}",
   booktitle="Local Proceedings of 6th Conference on Computability in Europe (CiE 2010)",
   pages="204-213",
   year="2010",
   month="July"
}

@techreport{lambdadelta6,
   author="F. {Guidi}", 
   title="{Landau's ``Grundlagen der Analysis'' from Automath to lambda-delta}", 
   type="Technical Report",
   institution="University of Bologna",
   address="Bologna, Italy",
   number="UBLCS 2009-16",
   year="2009",
   month="September"
}

@article{lambdadelta5,
   author="F. {Guidi}",
   title="{The Formal System $\lambda\delta$}",
   publisher="ACM",
   address="New York, NY, USA",
   journal="Transactions on Computational Logic",
   volume="11",
   number="1",
   year="2009",
   month="October",
   pages="Article No. 5"
}

@incollection{lambdadelta4,
   author="F. {Guidi}", 
   title="{Lambda Types on the Lambda Calculus with Abbreviations}",
   publisher="Universit\`a di Siena",
   address="Siena, Italy",
   editor="S. {Barry Cooper} and T. F. {Kent} and B. {L\"owe} and A. {Sorbi}", @comment="{\"}",
   booktitle="Local Proceedings of 3rd Conference on Computability in Europe (CiE 2007) Technical Report 487",
   pages="387-387",
   year="2007",
   month="June"
}

@techreport{lambdadelta3,
   author="F. {Guidi}", 
   title="{Lambda-Types on the Lambda-Calculus with Abbreviations}", 
   type="Technical Report",
   institution="University of Bologna",
   address="Bologna, Italy",
   number="UBLCS 2006-25",
   year="2006",
   month="November"
}

@techreport{lambdadelta2,
   author="F. {Guidi}", 
   title="{Lambda-Types on the Lambda-Calculus with Abbreviations: a Certified Specification}", 
   type="Technical Report",
   institution="University of Bologna",
   address="Bologna, Italy",
   number="UBLCS 2006-01",
   year="2006",
   month="January"
}

@misc{lambdadelta1,
   author="F. {Guidi}",
   title="{lambdadelta\_1}",
   howpublished="Formal specification with the proof assistant Coq 7.3.1",
   year="2006",
   month="November",
   note="Available at the $\lambda\delta$ Web site: {http://lambdadelta.info/}"
}