Specialist in hist, of USSR during feudal era, with special reference to Kiev Rus and Russ, peasant wars. Since 1957 Executive Editor, journal “Vestnik Leningradskogo universiteta. Seriya istorii, yazyka i literatury” (Herald of Leningrad University.
History, Language and Literature Series). Since 1960 member, Editor Board, journal “Istoriya Soviet Socialist Republic” (History of the USSR).