%0 Journal Article %A G. I. Sechkin %T Bavrin's operator method and integral representations connected with groups and semigroups of operators %J Doklady Akademii Nauk %D 1974 %P 770-773 %V 217 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1974_217_4_a7/ %G ru %F DAN_1974_217_4_a7