@MISC\{IMM1998-06494,
    author       = "P. Thyregod",
    title        = "En introduktion til statistik, bind {3A}: Repr{\ae}sentive unders{\o}gelser",
    year         = "1998",
    keywords     = "Stikpr{\o}ver fra endelige populationer, repr{\ae}sentative unders{\o}gelser",
    publisher    = "Technical University of Denmark, {DTU} Informatics, {E-}mail: reception@imm.dtu.dk",
    address      = "Asmussens Alle, Building 305, {DK-}2800 Kgs. Lyngby, Denmark",
    url          = "http://www.imm.dtu.dk/English.aspx"
}