@TECHREPORT\{IMM2002-01285,
    author       = "M. L. Andersen and M. Fedi and P. C. Hansen and A. Rapolla",
    title        = "Computational properties of algorithmes for multi-level inversion of {3-D} potential fields",
    year         = "2002",
    pages        = "19",
    number       = "",
    series       = "IMM-TR-2002-16",
    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/1285-full.html"
}