%0 Journal Article %A V. È. Lyantse %T On certain relations between closed operators %J Doklady Akademii Nauk %D 1972 %P 542-545 %V 204 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1972_204_3_a7/ %G ru %F DAN_1972_204_3_a7