@CONFERENCE\{IMM2004-03536, author = "M. Fr{\"{a}}nzle and M. R. Hansen", title = "A Robust Interpretation of Duration Calculus", year = "2004", pages = "83-85", booktitle = "Proceedings of the 16th Nordic Workshop on Programming Theory", volume = "", series = "", editor = "Paul Pettersson and Wang Yi", publisher = "", organization = "", address = "", url = "http://www2.compute.dtu.dk/pubdb/pubs/3536-full.html" }