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@article{DAN_1971_199_1_a2, author = {A. I. Koshelev}, title = {An inequality for elliptic operators of second order with restricted coefficients}, journal = {Doklady Akademii Nauk}, pages = {17--19}, publisher = {mathdoc}, volume = {199}, number = {1}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1971_199_1_a2/} }
A. I. Koshelev. An inequality for elliptic operators of second order with restricted coefficients. Doklady Akademii Nauk, Tome 199 (1971) no. 1, pp. 17-19. http://geodesic.mathdoc.fr/item/DAN_1971_199_1_a2/