[1]
Y. A. Mitropolsky and Fоdchuk V. I., “Asymptotic methods of nonlinear mechanics as applied to nonlinear differential equations with delayed argument”, Ukr. Mat. Zhurn., vol. 18, no. 3, pp. 65–84, Apr. 1966, Accessed: Dec. 06, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/8738