Dudnytskyi, P. M., Petryshyn, R. I. and Samoilenko, A. M. (2004) “Reducibility of a nonlinear oscillation system with pulse influence in the neighborhood of an integral manifold”, Ukrains’kyi Matematychnyi Zhurnal, 56(8), pp. 1076–1094. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/3823 (Accessed: 3May2024).