M. J. Saad, N. Kumaresan and Kuru Ratnavelu. Some Oscillation Theorems for Second Order Nonlinear and Nonhomogeneous Differential Equations with alternating coefficients. JOPAS [Internet]. 2019 Jul. 23 [cited 2024 Nov. 21];18(1). Available from: https://sebhau.edu.ly/journal/jopas/article/view/204