SlyusarchukV. Yu. “Conditions for the Existence and Uniqueness of Bounded Solutions of Nonlinear Differential Equations”. Ukrains’kyi Matematychnyi Zhurnal 61, no. 2 (February 25, 2009): 268-279. Accessed December 4, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3018.