@article{05793505,
title = {Uniqueness of limit cycles for a class of cubic systems with two invariant straight lines.},
journal = {Discrete Dynamics in Nature and Society},
volume = {2010},
year = {2010},
doi = {10.1155/2010/737068},
zbl = {1229.34046},
language = {en},
url = {http://dml.mathdoc.fr/item/05793505}
}
Xie, Xiangdong; Chen, Fengde; Zhan, Qingyi. Uniqueness of limit cycles for a class of cubic systems with two invariant straight lines.. Discrete Dynamics in Nature and Society, Tome 2010 (2010) . doi : 10.1155/2010/737068. http://gdmltest.u-ga.fr/item/05793505/