%0 Journal Article %A B. K. Kokebayev %A M. Otelbaev %A A. N. Shynybekov %T On questions of extension and restriction of operators %J Doklady Akademii Nauk %D 1983 %P 1307-1310 %V 271 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1983_271_6_a4/ %G ru %F DAN_1983_271_6_a4