Koichi Betsumiya Masaaki Harada Formally Self-Dual Codes Related to Type II Codes. 81-88 2003 14 Appl. Algebra Eng. Commun. Comput. 2 http://dx.doi.org/10.1007/s00200-003-0127-3 db/journals/aaecc/aaecc14.html#BetsumiyaH03