@CONFERENCE\{IMM1993-03766,
    author       = "V. V. Vidal and L. S{\o}rensen",
    title        = "Evaluation of integrated environmental models: some methodological issues",
    year         = "1993",
    pages        = "260-284",
    booktitle    = "NOAS'93, Trondheim, Norway",
    volume       = "",
    series       = "",
    editor       = "",
    publisher    = "",
    organization = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/3766-full.html"
}