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@article{DAN_1991_317_5_a2, author = {A. Dzhuraev}, title = {First-order elliptic systems that are degenerate on the boundary}, journal = {Doklady Akademii Nauk}, pages = {1041--1045}, publisher = {mathdoc}, volume = {317}, number = {5}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1991_317_5_a2/} }
A. Dzhuraev. First-order elliptic systems that are degenerate on the boundary. Doklady Akademii Nauk, Tome 317 (1991) no. 5, pp. 1041-1045. http://geodesic.mathdoc.fr/item/DAN_1991_317_5_a2/