@ARTICLE\{IMM2008-05520,
    author       = "L. S{\o}rensen and R. V. Vidal",
    title        = "Evaluating six soft approaches",
    year         = "2008",
    journal      = "Economic Analysis Working Papers",
    volume       = "76",
    editor       = "",
    number       = "9",
    publisher    = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/5520-full.html"
}