[1]
S. V. Yanchuk, “On the behavior of solutions of the equation for components of a normal system of differential equations”, Ukr. Mat. Zhurn., vol. 49, no. 10, pp. 1436–1440, Oct. 1997, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/5142