@CONFERENCE\{IMM1995-01861,
    author       = "A. E. Haxthausen",
    title        = "Order-sorted Algebraic Specifications with Higher-order Functions",
    year         = "1995",
    pages        = "133-151",
    booktitle    = "Proceedings of {AMAST'}95",
    volume       = "",
    series       = "Lecture Notes in Computer Science",
    editor       = "",
    publisher    = "Springer-Verlag",
    organization = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/1861-full.html"
}