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@article{DE_1987_23_1_a10, author = {A. G. Kuz'min}, title = {Second-order equations with an elliptic operator with respect to the space variables}, journal = {Differencialʹnye uravneni\^a}, pages = {102--113}, publisher = {mathdoc}, volume = {23}, number = {1}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1987_23_1_a10/} }
A. G. Kuz'min. Second-order equations with an elliptic operator with respect to the space variables. Differencialʹnye uravneniâ, Tome 23 (1987) no. 1, pp. 102-113. http://geodesic.mathdoc.fr/item/DE_1987_23_1_a10/