1. A Monjajeb, ‘Electronic spectra of certain transient gaseous diatomics at high temperature’ D. Phil Thesis, University of Allahabad, Allahabad, India, (1973)
2. K N Uttam, R Gopal and M M Joshi,Indian J. Phys. B67, 183 (1993)
3. M N Saha, N K Sur and K Majumdar,Z. Phys. 40, 648 (1927)
4. G Herzberg,Molecular spectra and molecular structure (Spectra of Diatomic Molecules, D Van Nostrand Company, New York, 1950) Vol.I pp 151
5. K P Huber and G Herzberg,Molecular spectra and molecular structure (Constants of Diatomic Molecules, D Van Nostrand Company, New York, 1979) Vol. IV