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@article{DAN_1989_309_6_a3, author = {V. A. Kozlov}, title = {The strong zero theorem for an elliptic boundary value problem in}, journal = {Doklady Akademii Nauk}, pages = {1299--1301}, publisher = {mathdoc}, volume = {309}, number = {6}, year = {1989}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1989_309_6_a3/} }
V. A. Kozlov. The strong zero theorem for an elliptic boundary value problem in. Doklady Akademii Nauk, Tome 309 (1989) no. 6, pp. 1299-1301. http://geodesic.mathdoc.fr/item/DAN_1989_309_6_a3/