Boichuk А. A., Boichuk О. A., and A. M. Samoilenko, “Solutions of Weakly-Perturbed Linear Systems Bounded on the Entire Axis”, Ukr. Mat. Zhurn., vol. 54, no. 11, pp. 1517–1530, Nov. 2002, Accessed: Dec. 06, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/4189