@article {GreifVarah2009,
    AUTHOR = {Greif, Chen and Varah, James M.},
     TITLE = {Iterative solution of skew-symmetric linear systems},
   JOURNAL = {SIAM J. Matrix Anal. Appl.},
    VOLUME = {31},
      YEAR = {2009},
    NUMBER = {2},
     PAGES = {584--601}
}