title = "Mathematical {M}arkup {L}anguage ({MathML}) {V}ersion 2.0",
editor="{Patrick Ion} and others",
howpublished = "W3C Recommendation 21 February 2001, \url{http://www.w3.org/TR/MathML2}",
title = "Mathematical {M}arkup {L}anguage ({MathML}) {V}ersion 2.0",
editor="{Patrick Ion} and others",
howpublished = "W3C Recommendation 21 February 2001, \url{http://www.w3.org/TR/MathML2}",