%0 Journal Article %A S. M. Shugrin %T Strong and weak extensions of differential operators.~II %J Differencialʹnye uravneniâ %D 1979 %P 2071-2084 %V 15 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1979_15_11_a16/ %G ru %F DE_1979_15_11_a16