@ARTICLE\{IMM2006-03412,
    author       = "V. V. Vidal",
    title        = "OR: a multidisciplinary discipline",
    year         = "2006",
    keywords     = "hard {OR,} soft {OR,} critical {OR,} creative {OR,} multi-methodology",
    pages        = "69-90",
    journal      = "Pesquisa Operational",
    volume       = "26",
    editor       = "",
    number       = "1",
    publisher    = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/3412-full.html"
}