Müller, Mike, Svetlana Puzynina, and Michaël Rao. “On Shuffling of Infinite Square-Free Words”. The Electronic Journal of Combinatorics 22, no. 1 (March 6, 2015): P1.55. Accessed April 4, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v22i1p55.