%0 Journal Article %A V. I. Rybakov %T On conditional mathematical expectations for functions integrable in the Pettis sense %J Matematičeskie zametki %D 1971 %P 565-570 %V 10 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1971_10_5_a11/ %G ru %F MZM_1971_10_5_a11