Bonato, A., C. Laflamme, M. Pawliuk, and N. Sauer. “Distinguishing Number of Universal Homogeneous Urysohn Metric Spaces”. The Electronic Journal of Combinatorics 29, no. 3 (September 23, 2022): P3.58. Accessed March 29, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v29i3p58.