V. M. Adamyan, “Myroslav L’vovych Horbachuk (on his 70th birthday)”, Ukr. Mat. Zhurn., vol. 60, no. 4, pp. 439–442, Apr. 2008, Accessed: Apr. 23, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/3166