@CONFERENCE\{IMM1975-03674,
    author       = "V. V. Vidal",
    title        = "Solving Multi-items Production Planning Problems",
    year         = "1975",
    keywords     = "Production planning, optimization, linear models",
    pages        = "78-88",
    booktitle    = "International Conference on {OR,} Hungary",
    volume       = "",
    series       = "",
    editor       = "J. Prepoka",
    publisher    = "",
    organization = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/3674-full.html"
}