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@article{DE_1973_9_9_a16, author = {V. R. Portnov}, title = {Normal solvability in the sense of {Hausdorff} of a certain nonlinear problem}, journal = {Differencialʹnye uravneni\^a}, pages = {1707--1717}, publisher = {mathdoc}, volume = {9}, number = {9}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1973_9_9_a16/} }
V. R. Portnov. Normal solvability in the sense of Hausdorff of a certain nonlinear problem. Differencialʹnye uravneniâ, Tome 9 (1973) no. 9, pp. 1707-1717. http://geodesic.mathdoc.fr/item/DE_1973_9_9_a16/