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@article{DE_1971_7_9_a12, author = {E. I. Moiseev}, title = {The {Neumann} problem for piece-wise smooth domains}, journal = {Differencialʹnye uravneni\^a}, pages = {1655--1666}, publisher = {mathdoc}, volume = {7}, number = {9}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1971_7_9_a12/} }
E. I. Moiseev. The Neumann problem for piece-wise smooth domains. Differencialʹnye uravneniâ, Tome 7 (1971) no. 9, pp. 1655-1666. http://geodesic.mathdoc.fr/item/DE_1971_7_9_a12/