@ARTICLE {BSV99b,
AUTHOR  = {Botchev, M. A. and Sleijpen, G. L. G. and {van der Vorst}, H. A.},
TITLE   = {Stability control for approximate implicit 
           time-stepping schemes with minimal residual iterations},
JOURNAL = {Applied Numerical Mathematics},
VOLUME  = {31}, 
YEAR    = {1999},
PAGES   = {239--253},}
%% Preprint 1043, Dep.\ Math., University Utrecht (December, 1997).