@article {MR2048157,
    AUTHOR = {Z{\u{a}}linescu, C.},
     TITLE = {Sharp estimates for {H}offman's constant for systems of linear
              inequalities and equalities},
   JOURNAL = {SIAM J. Optim.},
  FJOURNAL = {SIAM Journal on Optimization},
    VOLUME = {14},
      YEAR = {2003},
    NUMBER = {2},
     PAGES = {517--533 (electronic)},
      ISSN = {1052-6234},
   MRCLASS = {90C31 (90C25 90C48)},
  MRNUMBER = {MR2048157 (2006e:90134)},
MRREVIEWER = {Jean-No{\"e}l Corvellec}, }