1. A. I. Scott, “Ultraviolet Spectra of Natural Products,” Pergamon Press, Oxford, 1964, p. 70.
2. R. M. Silverstein and G. C. Bassler, “SpectrometricIdentification of Organic Compounds,” John Wiley & Sons, New York, 1967, p. 144.
3. N. Harada and K. Nakanishi, “Circular Dichromic Spectroscopy,” Tokyo Kagaku Dojin, Tokyo, 1982, p. 154.