The automorphism groups of the generalized quadratic residue codes
W. Cary Huffman · IEEE Transactions on Information Theory · 1995
We give the full automorphism groups as groups of semiaffine transformations, of the extended generalized quadratic residue codes. We also present a proof of the Gleason-Prange theorem for the extended generalized quadratic residue codes that relies only on their definition and elementary theory of linear characters.>