Zeng, Xiangneng, and Pingzhi Yuan. “On Sequences Without Short Zero-Sum Subsequences”. The Electronic Journal of Combinatorics 30, no. 4 (November 3, 2023): P4.21. Accessed March 27, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v30i4p21.