@ARTICLE {SVo95b,
   ANNOTE = {MR96g:65037},
   AUTHOR = {Sleijpen, Gerard L. G. and van der Vorst, Henk A.},
    TITLE = {Maintaining convergence properties of {B}i{C}{G}stab methods in
             finite precision arithmetic},
  JOURNAL = {Numer. Algorithms},
 FJOURNAL = {Numerical Algorithms},
   VOLUME = {10},
     YEAR = {1995},
   NUMBER = {3-4},
    PAGES = {203--223},
     ISSN = {1017-1398},}