%0 Journal Article %A R. K. Vasil'ev %T The convergence of positive linear operators and of singular integrals in certain partially ordered spaces %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1970 %P 35-45 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1970_6_a4/ %G ru %F IVM_1970_6_a4