@TECHREPORT\{IMM2001-0835,
    author       = "D. Calvetti and P. C. Hansen and L. Reichel",
    title        = "L-curve curvature bounds via Lanczos bidiagonalization",
    year         = "2001",
    number       = "",
    series       = "IMM-TR-2001-5",
    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/835-full.html"
}