Hyde, Kayleigh K., and Bjørn Kjos-Hanssen. “Nondeterministic Automatic Complexity of Overlap-Free and Almost Square-Free Words”. The Electronic Journal of Combinatorics 22, no. 3 (August 14, 2015): P3.22. Accessed March 29, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v22i3p22.