Pratsiovytyi, M., and O. Vynnyshyn. “Sets of Distinct Representations of Numbers in Numeral Systems With a Natural Base and a Redundant Alphabet”. Proceedings of the International Geometry Center, Vol. 19, no. 1, Mar. 2026, p. paper 6, 14 pages, doi:10.15673/pigc.v19i1.3307.