@TECHREPORT\{IMM2000-0646,
    author       = "H. B. Nielsen",
    title        = "Separable NonLinear Least Squares",
    year         = "2000",
    month        = "jan",
    pages        = "16",
    number       = "",
    series       = "",
    institution  = "Informatics and Mathematical Modelling, Technical University of Denmark, {DTU}",
    address      = "Richard Petersens Plads, Building 321, {DK-}2800 Kgs. Lyngby",
    type         = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/646-full.html",
    isbn_issn    = "IMM-REP-2000-01"
}