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@article{DAN_1984_274_5_a2, author = {I. V. Skrypnik}, title = {A criterion for regularity of a boundary point for quasilinear}, journal = {Doklady Akademii Nauk}, pages = {1040--1044}, publisher = {mathdoc}, volume = {274}, number = {5}, year = {1984}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1984_274_5_a2/} }
I. V. Skrypnik. A criterion for regularity of a boundary point for quasilinear. Doklady Akademii Nauk, Tome 274 (1984) no. 5, pp. 1040-1044. http://geodesic.mathdoc.fr/item/DAN_1984_274_5_a2/