%0 Journal Article %A V. A. Baskakov %T The generalization of some theorems of P.\,P.~Korovkin on positive operators %J Matematičeskie zametki %D 1973 %P 785-794 %V 13 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1973_13_6_a0/ %G ru %F MZM_1973_13_6_a0