@CONFERENCE\{IMM2000-02215,
    author       = "D. Bj{\o}rner",
    title        = "Formal Software Techniques in Railway Systems.",
    year         = "2000",
    pages        = "1-12",
    booktitle    = "Proc. 9th {IFAC} Symposium on Control in Transportation Systems, Braunschweig, Germany, June 2000",
    volume       = "",
    series       = "",
    editor       = "",
    publisher    = "",
    organization = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/2215-full.html"
}