@ARTICLE\{IMM1990-03705,
    author       = "V. V. Vidal",
    title        = "Lot sizing as an uncapacited facility location problem",
    year         = "1990",
    keywords     = "Location, planning, optimization",
    pages        = "143-147",
    journal      = "Investigacion Operacional (Cuba)",
    volume       = "xi",
    editor       = "",
    number       = "2",
    publisher    = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/3705-full.html"
}