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@article{DAN_1991_321_5_a3, author = {A. Dzhuraev}, title = {Some first-order nonelliptic overdetermined systems and their}, journal = {Doklady Akademii Nauk}, pages = {885--891}, publisher = {mathdoc}, volume = {321}, number = {5}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1991_321_5_a3/} }
A. Dzhuraev. Some first-order nonelliptic overdetermined systems and their. Doklady Akademii Nauk, Tome 321 (1991) no. 5, pp. 885-891. http://geodesic.mathdoc.fr/item/DAN_1991_321_5_a3/