@book{1991-mattson ,title={{Applied algebra, algebraic algorithms and error-correcting codes 9}} ,booktitle={{Applied algebra, algebraic algorithms and error-correcting codes 9}} ,editor={Harold F. Mattson, Jr. and Teo Mora and Thammavaram R. N. Rao} ,ISBN={3--540--54522--0} ,MR={94b:68002} ,publisher={Springer-Verlag} ,address={Berlin} ,series={Lecture Notes in Computer Science} ,volume={539} ,year={1991} }