%0 Journal Article %A Zítko, Jan %T Two step extrapolation and optimum choice of relaxation factor of the extrapolated S.O.R. method %J Applications of Mathematics %D 1988 %P 177-196 %V 33 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/AM.1988.104301/ %R 10.21136/AM.1988.104301 %G en %F 10_21136_AM_1988_104301