@ARTICLE\{IMM2007-03663,
    author       = "T. Thomadsen and T. Stidsen",
    title        = "The Generalized Fixed-Charge Network Design Problem",
    year         = "2007",
    pages        = "997-1007",
    journal      = "Computers and Operations Research",
    volume       = "34",
    editor       = "",
    number       = "4",
    publisher    = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/3663-full.html"
}