Slyusarchuk VY. Necessary and sufficient conditions for oscillation of solutions of nonlinear pulse systems with multiplicatively separated right-hand side. Ukr. Mat. Zhurn. [Internet]. 1995Mar.25 [cited 2024Jul.27];47(3):381–389. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/5427