Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1996_351_1_a6, author = {A. A. Melikyan}, title = {Singular characteristics of first-order partial differential}, journal = {Doklady Akademii Nauk}, pages = {24--28}, publisher = {mathdoc}, volume = {351}, number = {1}, year = {1996}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1996_351_1_a6/} }
A. A. Melikyan. Singular characteristics of first-order partial differential. Doklady Akademii Nauk, Tome 351 (1996) no. 1, pp. 24-28. http://geodesic.mathdoc.fr/item/DAN_1996_351_1_a6/