ABDULLAH, Hishyar Kh. On The Oscillation of Second Order Non-Linear Differential Equations. International Journal of Applied Mathematical Research, [S. l.], v. 3, n. 1, p. 1–6, 2013. DOI: 10.14419/ijamr.v3i1.1140. Disponível em: https://www.sciencepubco.com/index.php/ijamr/article/view/1140.. Acesso em: 29 apr. 2024.