van Dobben de Bruyn, Josse, and Dion Gijswijt. “On the Size of Subsets of $\mathbb{F}_q^n$ Avoiding Solutions to Linear Systems With Repeated Columns”. The Electronic Journal of Combinatorics 30, no. 4 (October 6, 2023): P4.1. Accessed March 29, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v30i4p1.