Nykorovych, S., and O. Nykyforchyn. “Metric and Topology on the Poset of Compact Pseudoultrametrics”. Carpathian Mathematical Publications 15, no. 2 (August 3, 2023): 321–330. Accessed January 18, 2025. https://personnel.pnu.edu.ua/index.php/cmp/article/view/6869.