Mukhigulashvili, Sulkhan, and Mariam Manjikashvili. “Dirichlet BVP for the Second Order Nonlinear Ordinary differential Equations at Resonance”. Mathematical Modelling and Analysis 24, no. 4 (October 25, 2019): 585-597. Accessed November 10, 2024. https://btp.vgtu.lt/index.php/MMA/article/view/10202.