Two improved block codes (Corresp.)

[1]  Selmer M. Johnson.  A new upper bound for error-correcting codes , 1962, IRE Trans. Inf. Theory.

[2]  Nelson Wax.  On upper bounds for error detecting and error correcting codes of finite length , 1959, IRE Trans. Inf. Theory.

[3]  Marcel J. E. Golay,et al.  Binary coding , 1954, Transactions of the IRE Professional Group on Information Theory.