%0 Journal Article %A V. S. Shulman %T Intertwining operators and linear operator equations %J Doklady Akademii Nauk %D 1988 %P 57-61 %V 301 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1988_301_1_a12/ %G ru %F DAN_1988_301_1_a12