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@article{DE_1987_23_8_a8, author = {\`E. M. Saak}, title = {The {Riemann} problem for nonselfadjoint elliptic differential equations}, journal = {Differencialʹnye uravneni\^a}, pages = {1360--1366}, publisher = {mathdoc}, volume = {23}, number = {8}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1987_23_8_a8/} }
È. M. Saak. The Riemann problem for nonselfadjoint elliptic differential equations. Differencialʹnye uravneniâ, Tome 23 (1987) no. 8, pp. 1360-1366. http://geodesic.mathdoc.fr/item/DE_1987_23_8_a8/