Florian, Josef, and L’ubomíra Dvořáková. “On Periodicity of Generalized Pseudostandard Words”. The Electronic Journal of Combinatorics 23, no. 1 (January 11, 2016): P1.2. Accessed March 29, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v23i1p2.