@ARTICLE\{IMM1997-0463,
    author       = "P. C. Hansen and T. Ostromsky and A. Sameh and Z. Zlatev",
    title        = "Solving Sparse Linear Least Squares Problems on Some Supercomputers by Using Large Dense Blocks",
    year         = "1997",
    pages        = "535-558",
    journal      = "BIT",
    volume       = "37",
    editor       = "",
    number       = "",
    publisher    = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/463-full.html"
}