| ASCORBICACID |
Duke, 1992 * |
| ISOPETASIN |
Wagner & Wolff, eds. 1977. New Natural Products (RS164. I56. 176) |
| KAEMPFEROL |
Williamson, E. M. and Evans, F. J., Potter's New Cyclopaedia of Botanical Drugs and Preparations, Revised Ed., Saffron Walden, the C. W. Daniel Co., Ltd., Essex UK, 362 pp, 1988, reprint 1989. |
| MAGNESIUM |
Duke, 1992 * |
| NIACIN |
Werbach, M. 1993. Healing with Food. Harper Collins, New York, 443 pp. |
| PETASIN |
Wagner & Wolff, eds. 1977. New Natural Products (RS164. I56. 176) |
| POTASSIUM |
Davies, S., and Stewart, A. 1990. Nutritional Medicine. Avon Books, New York. 509pp. |