KucherО. V., and PlichkoA. M. “Limits on the Real Line of Symmetric Spaces on Segments”. Ukrains’kyi Matematychnyi Zhurnal 47, no. 1 (January 25, 1995): 46–55. Accessed July 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/5381.