I. E. Vitrychenko, “Global λ-Stability of One Nonautonomous Quasilinear Second-Order Equation”, Ukr. Mat. Zhurn., vol. 54, no. 9, pp. 1172–1189, Sep. 2002, Accessed: Apr. 09, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/4157