%0 Journal Article %A W. Tung %T The heightening property of direct values of generalized potentials for the comparison function of a general elliptic operator of second order %J Differencialʹnye uravneniâ %D 1966 %P 266-294 %V 2 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1966_2_2_a9/ %G ru %F DE_1966_2_2_a9