@ARTICLE\{IMM2004-03534, author = "C. Jones and M. R. Hansen", title = "Special Issue on Duration Calculus", year = "2004", journal = "Formal Aspects of Computing , editorial notes by Clif Jones and Michael R. Hansen", volume = "16", editor = "", number = "2", publisher = "", url = "http://www2.compute.dtu.dk/pubdb/pubs/3534-full.html" }