1. Balasubramanian, K...Ph.D. Thesis, Indian Institute of Science, Bangalore, 1963.
2. —————..Proc. Ind. Acad. Sci., 1961,53 A, 105.
3. —— and Krishnan, R. S.Ibid., 1963,58 A, 209.
4. ——, —— and Iitaka, Y...Bull. Chem. Soc. Japan, 1962,35, 1303.
5. Bellamy, L. J...The Infra-red Spectra of Complex Molecules, Methuen and Co., London, 1954, p. 200.