@TECHREPORT\{IMM1999-0345,
    author       = "J. Brimberg and H. Juel and A. Sch{\"{o}}bel",
    title        = "Linear facility location in three dimensions - Models and solution methods",
    year         = "1999",
    number       = "",
    series       = "IMM-REP-1999-18",
    institution  = "Department of Mathematical Modelling, Technical University of Denmark",
    address      = "",
    type         = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/345-full.html"
}