Akbari, Saieed, Trent G. Marbach, Rebecca J. Stones, and Zhuanhao Wu. “Balanced Equi-$n$-Squares”. The Electronic Journal of Combinatorics 27, no. 4 (October 16, 2020): #P4.8. Accessed April 18, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v27i4p8.