@ARTICLE\{IMM1981-03677,
    author       = "V. V. Vidal",
    title        = "Un teorema sobre el modelo del tamaņo optimo de lote",
    year         = "1981",
    keywords     = "planeamiento, produccion, modelo lineal",
    pages        = "45-50",
    journal      = "Investigacion Operacional (Cuba)",
    volume       = "",
    editor       = "",
    number       = "",
    publisher    = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/3677-full.html"
}