@CONFERENCE\{IMM2003-01955,
    author       = "A. K. Strupchanska and M. Penicka and D. Bj{\o}rner",
    title        = "Railway Staff Rostering",
    year         = "2003",
    month        = "may",
    booktitle    = "FORMS2003: Symposium on Formal Methods for RailwayOperation and Control Systems",
    volume       = "",
    series       = "",
    editor       = "",
    publisher    = "L'Harmattan Hongrie",
    organization = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/1955-full.html"
}