“A Group of Continuous Transformations of a Region $[0; 1]$ That Preserve the Frequency of the Digits in $Q_s$-Representation of a Number”. Transactions of Institute of Mathematics, the NAS of Ukraine 13, no. 3 (December 22, 2017): 191–204. Accessed August 26, 2026. https://trim.imath.kiev.ua/index.php/trim/article/view/53.