M. J. SAAD, N. KUMARESAN AND KURU RATNAVELU. Some Oscillation Theorems for Second Order Nonlinear and Nonhomogeneous Differential Equations with alternating coefficients. Journal of Pure & Applied Sciences , [S. l.], v. 18, n. 1, 2019. DOI: 10.51984/jopas.v18i1.204. Disponível em: https://sebhau.edu.ly/journal/jopas/article/view/204. Acesso em: 16 aug. 2024.