Slyusarchuk, Lyudmila. “Application of a Differential Criterion to the Study of the Convergence of Number Series”. Modeling, Control and Information Technologies: Proceedings of International scientific and practical conference, no. 3 (November 6, 2019): 211. Accessed April 28, 2024. https://itconfdoc.nuwm.edu.ua/index.php/ITConf/article/view/84.