A. Ashikhmin, A. Barg, and S. Litsyn. Codes and Association Schemes, volume 56 of DIMACS Series in Discrete Mathematics and Theoretical Computer Science, page 287-301. DIMACS/AMS, (1999)
A. Barg, and D. Jaffe. Codes and Association Schemes, volume 56 of DIMACS Series in Discrete Mathematics and Theoretical Computer Science, page 25-32. DIMACS/AMS, (1999)