Steven T. Dougherty T. Aaron Gulliver Masaaki Harada Optimal Formally Self-Dual Codes over F<sub>5</sub> and F<sub>7</sub>. 227-236 2000 10 Appl. Algebra Eng. Commun. Comput. 3 http://link.springer.de/link/service/journals/00200/bibs/0010003/00100227.htm db/journals/aaecc/aaecc10.html#DoughertyGH00