O. B. Skaskiv and Trusevich О. M., “Relations of Borel Type for Generalizations of Exponential Series”, Ukr. Mat. Zhurn., vol. 53, no. 11, pp. 1580–1584, Nov. 2001, Accessed: Dec. 06, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/4379