Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1977_234_1_a0, author = {A. Dzhuraev}, title = {On systems of first-order equations of composite type in space}, journal = {Doklady Akademii Nauk}, pages = {11--14}, publisher = {mathdoc}, volume = {234}, number = {1}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1977_234_1_a0/} }
A. Dzhuraev. On systems of first-order equations of composite type in space. Doklady Akademii Nauk, Tome 234 (1977) no. 1, pp. 11-14. http://geodesic.mathdoc.fr/item/DAN_1977_234_1_a0/