@article{1183528865,
author = {Friedman, Marcelle},
title = {Quasi-periodic solutions of nonlinear ordinary differential equations with small damping},
journal = {Bull. Amer. Math. Soc.},
volume = {73},
number = {6},
year = {1967},
pages = { 460-464},
language = {en},
url = {http://dml.mathdoc.fr/item/1183528865}
}
Friedman, Marcelle. Quasi-periodic solutions of nonlinear ordinary differential equations with small damping. Bull. Amer. Math. Soc., Tome 73 (1967) no. 6, pp. 460-464. http://gdmltest.u-ga.fr/item/1183528865/