@BOOK\{IMM1990-03734,
    author       = "V. V. Vidal",
    title        = "{OR} in developing countries",
    year         = "1990",
    volume       = "82",
    number       = "",
    series       = "",
    publisher    = "",
    address      = "",
    edition      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/3734-full.html"
}