@CONFERENCE\{IMM1981-03756,
    author       = "V. V. Vidal",
    title        = "Import Planning in Developing Countries - a cybernetical approach",
    year         = "1981",
    keywords     = "planing, lot-sizing, optimization",
    pages        = "78-85",
    booktitle    = "5th World Congress on Cybernetics, Mexico",
    volume       = "",
    series       = "",
    editor       = "",
    publisher    = "Pergamon Press",
    organization = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/3756-full.html"
}