@article {EstrinGreif2015,
    AUTHOR  = {Estrin, Ron and Greif, Chen},
    TITLE   = {On Nonsingular Saddle-Point Systems With a Maximally
			Rank Deficient Leading Block},
    JOURNAL = {SIAM Journal on Matrix Analysis and Applications},
    VOLUME  = 36,
    NUMBER  = 2,
    PAGES   = "367--384",
    YEAR    = {2015}
}