V. Y. Slyusarchuk, “Conditions for the existence of bounded solutions of nonlinear differential and functional differential equations”, Ukr. Mat. Zhurn., vol. 62, no. 6, pp. 837–846, Jun. 2010, Accessed: Apr. 09, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/2914