%0 Journal Article %A B. A. Kushner %T Certain relations between the properties of constructive functions and of operators from quasinumbers to quasinumbers %J Doklady Akademii Nauk %D 1967 %P 29-32 %V 177 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1967_177_1_a6/ %G ru %F DAN_1967_177_1_a6