%0 Journal Article %A S. S. Sannikov %T Representations of a continuous group by unbounded operators %J Doklady Akademii Nauk %D 1967 %P 1285-1288 %V 177 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1967_177_6_a8/ %G ru %F DAN_1967_177_6_a8