1. R. Gunther, in: The Greek Herbal of Dioscorides, p. 421. (Hafner, New York 1959).
2. M. Grieve, in: A Modern Herbal, Hafner, New York 1959.
3. All the biological and clinical studies were performed using extract of the root ofAlkanna tinctoria, which I obtained from the Greek Pharmaceutical Company ‘Chropi SA’.
4. V.P. Papageorgiou, Chem. Chrom.7, 45 (1978).
5. V.P. Papageorgiou, Chem. Chron.6, 365 (1977).