@CONFERENCE\{IMM1979-0333,
    author       = "H. Juel",
    title        = "Duality in location problems",
    year         = "1979",
    month        = "oct",
    pages        = "418-424",
    booktitle    = "The Institute of Management Sciences, Southeastern Chapter, 15th Annual Meeting",
    volume       = "",
    series       = "",
    editor       = "Richard F. Deckro and E. P. Winkofsky",
    publisher    = "",
    organization = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/333-full.html"
}