%0 Journal Article %A Bl. Sendov %T On the theorems of P.\,P.~Korovkin for convergence of sequences of linear positive operators %J Doklady Akademii Nauk %D 1967 %P 518-520 %V 177 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1967_177_3_a7/ %G ru %F DAN_1967_177_3_a7