SlyusarchukV. Yu. “Conditions of Existence of Bounded and Almost Periodic Solutions of nonlinear differential Equation With Perturbations of Solutions”. Ukrains’kyi Matematychnyi Zhurnal 68, no. 9 (September 25, 2016): 1286-1296. Accessed December 9, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/1921.