@CONFERENCE\{IMM2000-0949,
    author       = "T. Mossakowski and A. E. Haxthausen and B. Krieg-Brückner",
    title        = "Subsorted Partial Higher-order Logic as an extension of {CASL}",
    year         = "2000",
    pages        = "126-145",
    booktitle    = "WADT'99",
    volume       = "",
    series       = "Lecture Notes in Computer Science",
    editor       = "",
    publisher    = "Springer-Verlag",
    organization = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/949-full.html"
}