[1]
E. V. . Voskresensky, “The Lyapunov direct method in the theory of asymptotic equivalence of differential equations”, Ukr. Mat. Zhurn., vol. 43, no. 1, pp. 115–118, Jan. 1991, Accessed: Dec. 06, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/9314