Masaaki Harada Masaaki Kitazume Akihiro Munemasa On a 5-design related to an extremal doubly even self-dual code of length 72. 143-146 2004 107 J. Comb. Theory, Ser. A 1 http://dx.doi.org/10.1016/j.jcta.2004.03.005 db/journals/jct/jcta107.html#HaradaKM04