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@article{DE_1973_9_10_a15, author = {A. F. Filippov}, title = {Smoothness of generalized solutions near the vertex of a polyhedral angle}, journal = {Differencialʹnye uravneni\^a}, pages = {1889--1903}, publisher = {mathdoc}, volume = {9}, number = {10}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1973_9_10_a15/} }
A. F. Filippov. Smoothness of generalized solutions near the vertex of a polyhedral angle. Differencialʹnye uravneniâ, Tome 9 (1973) no. 10, pp. 1889-1903. http://geodesic.mathdoc.fr/item/DE_1973_9_10_a15/