@CONFERENCE\{IMM1999-0348,
    author       = "H. Juel",
    title        = "Linear facility location in three dimensions - Models and solution methods",
    year         = "1999",
    booktitle    = "8th International Symposium on Locational Decisions",
    volume       = "",
    series       = "",
    editor       = "",
    publisher    = "",
    organization = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/348-full.html"
}