@CONFERENCE\{IMM1999-0451,
    author       = "A. Berglund and P. C. Hansen",
    title        = "Constrained Linear Regularization",
    year         = "1999",
    pages        = "46-53",
    booktitle    = "Proceedings of the Interdisciplinary Inversion Workshop 6",
    volume       = "",
    series       = "",
    editor       = "B. H. Jacobsen",
    publisher    = "Dept. of Earth Science",
    organization = "",
    address      = "Aarhus University",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/451-full.html"
}