EditorialBoard, “Volodymyr Oleksandrovych Marchenko (On His 80th Birthday)”, Ukr. Mat. Zhurn., vol. 54, no. 7, p. 997, Jul. 2002, Accessed: Feb. 17, 2026. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/4136