AKBAR, M. Ali Ali; SIDDIQUE, Sk. Tanzer Ahmed Ahmed. Perturbation solutions of fifth order oscillatory nonlinear systems. Nonlinear Analysis: Modelling and Control, [S. l.], v. 16, n. 2, p. 123–134, 2011. DOI: 10.15388/NA.16.2.14100. Disponível em: https://www.zurnalai.vu.lt/nonlinear-analysis/article/view/14100. Acesso em: 5 jul. 2025.