1. 1. T. Ihara, M. Katsuta, S. Ohshiro, K. Nakamura, S. Ito, J.Photopolym. Sci. Technol. 25, No. 4, 539 (2012).
2. 2. Handbook of Chemistry and Physics, 72nd Ed., CRC.
3. 3. G. Herzberg, Spectra of Diatomic Molecules, Van Nostrand Reinhold Company, N. Y. , 1950.