%0 Journal Article %A Stehlíková, Beáta %T On the convergence of operators %J Mathematica slovaca %D 1988 %P 395-401 %V 38 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MASLO_1988__38_4_a12/ %G en %F MASLO_1988__38_4_a12