@BOOK\{IMM1996-0659,
    author       = "H. B. Nielsen",
    title        = "Numerisk Line{\ae}r Algebra",
    year         = "1996",
    edition      = "2nd",
    pages        = "238",
    volume       = "",
    number       = "",
    series       = "",
    publisher    = "Informatics and Mathematical Modelling, Technical University of Denmark, {DTU}",
    address      = "Richard Petersens Plads, Building 321, {DK-}2800 Kgs. Lyngby",
    edition      = "2nd",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/659-full.html"
}