@ARTICLE\{IMM1998-0460,
    author       = "T. Ostromsky and P. C. Hansen and Z. Zlatev",
    title        = "A Coarse-Grained Parallel {QR-}Factorization Algorithms for Sparse Least Squares Problems",
    year         = "1998",
    pages        = "937-964",
    journal      = "Parallel Computing",
    volume       = "24",
    editor       = "",
    number       = "",
    publisher    = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/460-full.html"
}