Casselgren, Carl Johan, Klas Markström, and Lan Anh Pham. “Latin Cubes With Forbidden Entries”. The Electronic Journal of Combinatorics 26, no. 1 (January 11, 2019): #P1.2. Accessed May 29, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v26i1p2.