1. Mathematical theory of the symmetrical factorial design;Bose;Sankhya,1947
2. Introduction to the Theory of Groups of Finite Order;Carmichael,1937
3. Results of a geometric approach to the theory and construction of non-binary, multiple error and failure correcting codes;Dwork;IRE Convention Record,1959
4. Error detecting and error correcting codes;Hamming;Bell System Tech. J.,1950