1. Hur, J.:Dong-Eui-Bo-Gam, Namsandang Press, Seoul, Korea, p. 26 (1981).
2. Namba, T.:Colored Illustrations of Wakanyaku, Boyuksa Press, Japan, p. 321 (1980).
3. Lee, H. S.:Folk Medicine, Gyechuk Munwhasa Press, Seoul, Korea, p. 102 (1975).
4. Han, B. H., Park, J. H., Park, M. H., Han, Y. N. and Park, M. K.: Absolute configuration of frangufoline and its heat induced artifact.Arch. Pharm. Res. 10(3), 200 (1987).
5. Han, B. H. and Park, M. H.:Folk Medicine, Amer, Chem. Soc. Press, p. 205 (1986).