Kharaghani, Hadi, Sara Sasani, and Sho Suda. “Mutually Unbiased Bush-Type Hadamard Matrices and Association Schemes”. The Electronic Journal of Combinatorics 22, no. 3 (July 1, 2015): P3.10. Accessed March 27, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v22i3p10.