@article{paperid:1017540, author = {Afsharnejad, Zahra and Karimi Amaleh, Majid}, title = {cotinuation of periodic solutions for a class of Lienard equation under two parametric nonautonomous perturbations}, journal = {Vietnam Journal of Mathematics}, year = {2010}, volume = {38}, number = {2}, month = {July}, issn = {0866-7179}, pages = {203--210}, numpages = {7}, keywords = {Perturbation; periodic orbit; persistency; bifurcation map}, }