1. Colthup , N. B.
Daly , L. H. and
Wiberley , S. E. 1964. Introduction to Infrared and Raman Spectroscopy 282New York: Academic Press.
2. Furniss , B. S. and
Vogel , A. I. 1984. A Text Book of Practical Organic Chemistry, 4th Edition 157London: Longmans.