Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1988_24_2_a2, author = {G. S. Krechetov}, title = {Lyapunov functions for a class of second-order autonomous systems}, journal = {Differencialʹnye uravneni\^a}, pages = {207--211}, publisher = {mathdoc}, volume = {24}, number = {2}, year = {1988}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1988_24_2_a2/} }
G. S. Krechetov. Lyapunov functions for a class of second-order autonomous systems. Differencialʹnye uravneniâ, Tome 24 (1988) no. 2, pp. 207-211. http://geodesic.mathdoc.fr/item/DE_1988_24_2_a2/