Hishyar Kh. Abdullah
      Periodic solutions of a class of a generalized Lienard equation
      Applied Mathematical Sciences, Vol. 11, 2017, no. 20, 985-993
      https://doi.org/10.12988/ams.2017.7138
Copyright © 2017 Hishyar Kh. Abdullah. This article is distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.