Klaus Huber The MacWilliams Theorem for Two-Dimensional Modulo Metrics. 41-48 1996 8 Appl. Algebra Eng. Commun. Comput. 1 http://link.springer.de/link/service/journals/00200/bibs/6008001/60080041.htm db/journals/aaecc/aaecc8.html#Huber96