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@article{DE_1983_19_4_a9, author = {E. S. Gubanova}, title = {Some questions of the theory of second-order elliptic equations on the plane}, journal = {Differencialʹnye uravneni\^a}, pages = {618--621}, publisher = {mathdoc}, volume = {19}, number = {4}, year = {1983}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1983_19_4_a9/} }
E. S. Gubanova. Some questions of the theory of second-order elliptic equations on the plane. Differencialʹnye uravneniâ, Tome 19 (1983) no. 4, pp. 618-621. http://geodesic.mathdoc.fr/item/DE_1983_19_4_a9/