Pach, Péter Pál, and Máté Vizer. “Improved Lower Bounds for Multiplicative Square-Free Sequences”. The Electronic Journal of Combinatorics 30, no. 4 (December 1, 2023): P4.31. Accessed April 4, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v30i4p31.