Self-Orthogonal 3-(56, 12, 65) Designs and Extremal Doubly-Even Self-Dual Codes of Length 56.

Masaaki Harada Self-Orthogonal 3-(56, 12, 65) Designs and Extremal Doubly-Even Self-Dual Codes of Length 56. 5-16 2006 38 Des. Codes Cryptography 1 http://dx.doi.org/10.1007/s10623-004-5657-6 db/journals/dcc/dcc38.html#Harada06