A. M. Samoilenko, O. I. Stepanets, and I. A. Shevchuk, “The international conference „International workshop on analysis and its applications"”, Ukr. Mat. Zhurn., vol. 56, no. 12, p. 1722, Dec. 2004, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/3880