References
- Geissman T. A. The Chemistry of Flavonoid Compounds. The MacMillan Co, New York 1962
- Harborne J. B. Phytochemical Methods. Chapman and Hall, London 1973
- Mabry T. J., Markham K. R., Thomas M. B. The Systematic Identification of Flavonoids. Springer Verlag, New York 1970