%0 Journal Article %A V. A. Solonnikov %T On operators admitting regularization %J Zapiski Nauchnykh Seminarov POMI %D 1971 %P 159-163 %V 21 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1971_21_a9/ %G ru %F ZNSL_1971_21_a9