Xia, Zheng-Jiang, Jae-Ho Lee, and Jack H. Koolen. “A New Feasibility Condition for the AT4 Family”. The Electronic Journal of Combinatorics 30, no. 2 (April 7, 2023): P2.7. Accessed March 29, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v30i2p7.