Kaplun, Y. I., Samoilenko, A. M. and Samoilenko, V. G. (2002) “Singularly Perturbed Equations with Impulse Action”, Ukrains’kyi Matematychnyi Zhurnal, 54(8), pp. 1089-1009. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/4149 (Accessed: 9May2024).