Sartabanov, Z., & Aitenova, G. (2020). MULTIPERIODIC SOLUTIONS OF LINEAR SYSTEMS INTEGRO-DIFFERENTIAL EQUATIONS WITH OPERATOR AND ε-PERIOD OF HEREDITARY. Известия НАН РК. Серия физико-математическая, (1), 23–31. извлечено от https://journals.nauka-nanrk.kz/physics-mathematics/article/view/388