Öziş, T. and Yildirim, A. (2008) “Determination of limit cycles by iterated homotopy perturbation method for nonlinear oscillators with strong nonlinearity”, Topological Methods in Nonlinear Analysis, 31(2), pp. 349–357. Available at: https://apcz.umk.pl/TMNA/article/view/TMNA.2008.026 (Accessed: 22 July 2024).