\bib{1991/mattson} \yr 1991 \isbn 3--540--54522--0 \mr 94b:68002 \editor Harold F. Mattson, Jr. \editor Teo Mora \editor Thammavaram R. N. Rao \book Applied algebra, algebraic algorithms and error-correcting codes 9 \series Lecture Notes in Computer Science \seriesvol 539 \publ Springer-Verlag \publaddr Berlin \endref