[1]
D. A. Kovtonyuk, “On the theory of hyper-$Q$-homeomorphisms”, Ukr. Mat. Zhurn., vol. 62, no. 1, pp. 139–144, Jan. 2010, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/2850