[1]
M. K. Bugir, “Conditions of nonoscillation of binomial systems of differential equations”, Ukr. Mat. Zhurn., vol. 49, no. 6, pp. 836–841, Jun. 1997, Accessed: Dec. 06, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/5069