1.
Pratsiovytyi MV, Klymchuk SO, Makarchuk OP. Level sets of asymptotic mean of digits function for $4$-adic representation of real number. MFAT. 2016;22(2):184-196. Accessed December 16, 2025. https://zen.imath.kiev.ua/index.php/mfat/article/view/635