@Article{Hanson:1982:ATA,
  author =       "Richard J. Hanson and Karen H. Haskell",
  title =        "{Algorithm 587}: Two Algorithms for the Linearly
                 Constrained Least Squares Problem",
  journal =      "{ACM} Transactions on Mathematical Software",
  volume =       "8",
  number =       "3",
  pages =        "323--333",
  month =        sep,
  year =         "1982",
  CODEN =        "ACMSCU",
  ISSN =         "0098-3500",
  note =         "See also \cite{Dadurkevicius:1989:RA}.",
  URL =          "http://doi.acm.org/10.1145/356004.356010",
  keywords =     "algorithms; covariance matrix; equality constraints;
                 inconsistent constraints; inequality constraints;
                 linear least squares solution",
}