Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1981_17_5_a9, author = {N. P. Erugin and M. M. Smirnov}, title = {Functionally invariant solutions of differential equations}, journal = {Differencialʹnye uravneni\^a}, pages = {853--865}, publisher = {mathdoc}, volume = {17}, number = {5}, year = {1981}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1981_17_5_a9/} }
N. P. Erugin; M. M. Smirnov. Functionally invariant solutions of differential equations. Differencialʹnye uravneniâ, Tome 17 (1981) no. 5, pp. 853-865. http://geodesic.mathdoc.fr/item/DE_1981_17_5_a9/