1. E.A.V. Ebsworth, D.W.H. Rankin, S. Cradock, Structural Methods in Inorganic Chemistry. USA 1991, Chapter 5.
2. Applied Infrared Spectroscopy;Lee Smith,1979
3. High Resolution Spectroscopy;Hollas,1982
4. Infrared and Raman Spectra;Herzberg,1945
5. Infrared and Molecular Structure;Davis,1963