1. H. Fujiki, T. Horiuchi, K. Yamashita, H. Hakii, M. Suganuma, H. Nishino, A. Iwashima, Y. Hirata and T. Sugimura, “Plant Flavonoids in Biology and Medicine: Biochemical, Pharmacological and Structure-Activity Relationships,” Alan R. Liss, New York, 1986, pp. 429–440.