[1]
Y. V. Rogovchenko, “Periodic solutions of pulse evolutionary systems with unbounded nonlinearities”, Ukr. Mat. Zhurn., vol. 45, no. 10, pp. 1390–1397, Oct. 1993, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/5944