Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1995_343_2_a2, author = {L. V. Ovsyannikov}, title = {Regular and nonregular partially invariant solutions}, journal = {Doklady Akademii Nauk}, pages = {156--159}, publisher = {mathdoc}, volume = {343}, number = {2}, year = {1995}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1995_343_2_a2/} }
L. V. Ovsyannikov. Regular and nonregular partially invariant solutions. Doklady Akademii Nauk, Tome 343 (1995) no. 2, pp. 156-159. http://geodesic.mathdoc.fr/item/DAN_1995_343_2_a2/