@CONFERENCE\{IMM2001-0606,
    author       = "V. Vidal and L. S{\o}rensen and L. B. Rasmussen",
    title        = "Soft approaches for a changing world",
    year         = "2001",
    month        = "sep",
    keywords     = "planning, soft {OR}",
    booktitle    = "{SEFI} conference, Copenhagen, September 2001",
    volume       = "",
    series       = "",
    editor       = "",
    publisher    = "",
    organization = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/606-full.html"
}