@TECHREPORT\{IMM1977-0365,
    author       = "H. Juel",
    title        = "Bi-objective location problems with rectangular distances",
    year         = "1977",
    number       = "",
    series       = "",
    institution  = "Michigan Technological University",
    address      = "",
    type         = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/365-full.html"
}