@CONFERENCE\{IMM1982-02309,
    author       = "D. Bj{\o}rner and H. H. L{\o}vengreen",
    title        = "Formal Semantics of Data Base",
    year         = "1982",
    booktitle    = "8th Int'l. Very Large Data Base Conf.",
    volume       = "",
    series       = "",
    editor       = "",
    publisher    = "",
    organization = "",
    address      = "Mexico City",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/2309-full.html"
}