1. Balakrishna, S., Rama-nathan, J. D., Seshadri, T.R. and Venkataraman, B.Proc. Roy. Soc., 1962,268 A, 11.
2. Ramanathan, J. D. and Seshadri, T. R.Curr. Sci., 1964,33, 553.
3. Seshadri, T. R., Subba Rao, N. V. and Subramanyam, B.Proc. Ind. Acad. Sci., 1968, p. 314.
4. Murti, G. V. L. N. and Seshadri, T. R.Ibid., 1941,14, 593.
5. —..Ibid, 1942,16, 244.