@MISC\{IMM2002-01728,
    author       = "T. S. Nielsen",
    title        = "Model specifikation for {WPPT} 4",
    year         = "2002",
    edition      = "1.0",
    pages        = "22",
    publisher    = "Informatics and Mathematical Modelling",
    address      = "Technical University of Denmark, Lyngby, Denmark",
    note         = "In Danish",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/1728-full.html"
}