@CONFERENCE\{IMM1997-01868,
    author       = "M. Cerioli and A. Haxthausen and B. Krieg-Brückner and T. Mossakowski",
    title        = "Permissive Subsorted Partial Logic in {CASL}",
    year         = "1997",
    booktitle    = "Proceedings of {AMAST'}97",
    volume       = "",
    series       = "Lecture Notes in Computer Science",
    editor       = "",
    publisher    = "Springer-Verlag",
    organization = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/1868-full.html"
}