@article{paperid:1008209,
author = {Afsharnejad, Zahra and O.Rabiei Motlagh and Tavakoli, Mostafa},
title = {Effect of all quatratic terms on the third order oscillation},
journal = {Journal of Dynamical Systems and Geometric Theories},
year = {2008},
volume = {6},
number = {1},
month = {July},
issn = {1726-037X},
pages = {35--48},
			numpages = {13},
keywords = {center manifold- bifurcation- stability- periodic solution},
}