1. Balakrishnan, A. V.: A Contribution to the Sphere Packing Problem of Communication Theory, J. Math. Anal. Appl., vol. 3, December, 1961, pp. 485–506.
2. Ziv, J.: Generation of Optimal Codes by a “Pyramid-Packing” Argument, IEEE Trans. Inform. Theory, vol. IT-10, no. 3, July, 1964, pp. 253–255.
3. Balakrishnan, A. V.: “Advances in Communication,” Academic Press, New York, 1965.
4. Stutt, C. A.: Regular Polyhedron Codes, General Electric Res. Lab., Res. Rept. 59-R6–2202, March, 1959.
5. Balakrishnan, A. V., and J. E. Taber: Error Rates in Coherent Communication Systems, IRE Trans. Commun. Systems, vol. CS-10, March, 1962, pp. 86–90.