Slyusarchuk, V. Yu. “Invertibility Conditions for Nonlinear Autonomous Differential Operators in the Space of Functions Bounded on the Axis”. Ukrains’kyi Matematychnyi Zhurnal 73, no. 11 (November 23, 2021): 1507 - 1515. Accessed May 4, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/2323.