%0 Journal Article %A I. V. Parkhimovich %T The construction of $s$-adjoints to integro-differential operators %J Differencialʹnye uravneniâ %D 1972 %P 1486-1493 %V 8 %N 8 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1972_8_8_a18/ %G ru %F DE_1972_8_8_a18