@CONFERENCE\{IMM1979-0332,
    author       = "H. Juel",
    title        = "Solution conditions for location problems with two new facilities",
    year         = "1979",
    month        = "nov",
    pages        = "80-81",
    booktitle    = "American Institute for Decision Sciences, 11th Annual Meeting",
    volume       = "",
    series       = "",
    editor       = "Joe F. Hair, Jr.",
    publisher    = "",
    organization = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/332-full.html"
}