Russev, A. V. “On Conjugacy in Groups of Finite-State Automorphisms of Rooted Trees”.
Ukrains’kyi Matematychnyi Zhurnal
60, no. 10 (October 25, 2008): 1357–1366. Accessed April 27, 2025.
https://umj.imath.kiev.ua/index.php/umj/article/view/3250
.