@article{GDZPPN002541912,
title = {Melnikov deviations and limit cycles for Lienard equations},
journal = {Revista colombiana de matematicas},
volume = {26},
year = {1992},
pages = {3-26},
zbl = {0774.34021},
url = {http://dml.mathdoc.fr/item/GDZPPN002541912}
}
Billeke, J.; Burgos, H., Wallace, M. Melnikov deviations and limit cycles for Lienard equations. Revista colombiana de matematicas, Tome 26 (1992) pp. 3-26. http://gdmltest.u-ga.fr/item/GDZPPN002541912/