@TECHREPORT\{IMM2001-0840, author = "M. R. Hansen", title = "The 13th Nordic Workshop on Programming Theory", year = "2001", number = "", series = "IMM-TR-2001-12", institution = "Informatics and Mathematical Modelling, Technical University of Denmark, {DTU}", address = "Richard Petersens Plads, Building 321, {DK-}2800 Kgs. Lyngby", type = "", url = "http://www2.compute.dtu.dk/pubdb/pubs/840-full.html" }