Artykova, Z., Rakhmonov, F., & Fayziyev, A. (2026). Periodic Solutions of a System of Nonlinear Integro-Differential Equations with a Product of Two Nonlinear Functions and Maxima. Journal of Osh State University. Differential Equations, (2), 11–24. извлечено от https://journal.oshsu.kg/index.php/diffeq/article/view/4820