Crnkovic, Dean, Danilovic, Doris Dumicic, and Rukavina, Sanja. “On Symmetric (78,22,6) Designs and Related Self-Orthogonal Codes”. Utilitas Mathematica 109 (November 9, 2018). Accessed May 7, 2026. https://utilitasmathematica.com/index.php/Index/article/view/1263.