doi:10.1080/00207160903248659engAbbasbandy, S.Lopez, J. L.Lopez-Ruiz, R.The homotopy analysis method and the Lienard equationART-2011-72542In this article, Liénard equations are considered. The limit cycles of these systems are studied by applying the homotopy analysis method (HAM). The amplitude and frequency obtained with this methodology are in good agreement with those calculated by computational methods. This puts in evidence that HAM is a useful tool to solve nonlinear differential equations.2011http://zaguan.unizar.es/record/17114910.1080/00207160903248659http://zaguan.unizar.es/record/171149oai:zaguan.unizar.es:171149International journal of computer mathematics 88, 1 (2011), 121-134by-nchttps://creativecommons.org/licenses/by-nc/4.0/deed.esinfo:eu-repo/semantics/openAccess