D. A. Kovtonyuk and R. R. Salimov, “Asymptotic behavior of generalized quasiisometries at a point”, Ukr. Mat. Zhurn., vol. 63, no. 4, pp. 481–488, Apr. 2011, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/2734