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@article{AA_1996_8_2_a11, author = {N. N. Ural'tseva}, title = {$C^1$ regularity of the boundary of a noncoincident set in a problem with an obstacle}, journal = {Algebra i analiz}, pages = {205--221}, publisher = {mathdoc}, volume = {8}, number = {2}, year = {1996}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AA_1996_8_2_a11/} }
N. N. Ural'tseva. $C^1$ regularity of the boundary of a noncoincident set in a problem with an obstacle. Algebra i analiz, Tome 8 (1996) no. 2, pp. 205-221. http://geodesic.mathdoc.fr/item/AA_1996_8_2_a11/