SlyusarchukV. Yu. “Conditions for Almost Periodicity of Bounded Solutions of Nonlinear Differential Equations Unsolved With Respect to the Derivative”. Ukrains’kyi Matematychnyi Zhurnal 66, no. 3 (March 25, 2014): 384–393. Accessed November 23, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/2140.