@techreport{sr2010,
    author = "Danny C. Sorensen and Marielba Rojas",
    title  = "{Efficient numerical methods for least-norm regularization}",
    institution = "Delft Institute of Applied Mathematics, Delft University of Technology, Delft, March 18 2010",
    number = "Technical Report 10-10",
    year = 2010
}