%0 Journal Article %A M. L. Gorbachuk %A A. Ya. Shklyar %T On the Smoothness of Weak Solutions of Operator Differential Equations %J Funkcionalʹnyj analiz i ego priloženiâ %D 1999 %P 59-61 %V 33 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_1999_33_1_a4/ %G ru %F FAA_1999_33_1_a4