Betsumiya, Koichi, Masaaki Harada, and Akihiro Munemasa. “A Complete Classification of Doubly Even Self-Dual Codes of Length 40”. The Electronic Journal of Combinatorics 19, no. 3 (August 9, 2012): P18. Accessed March 27, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v19i3p18.