References
- Allport N. L. Chemistry and pharmacy of vegetable drugs. London 1923
- Hocking G. M. A Dictionary of terms in pharmacognosy and other divisions of economic botany. Springfield (Illinois)USA 1955
- The Merck Index—7th ed. Merck & Co, Inc., Rahway (New Jersey)USA 1960
- Potter's Cyclopaedia of botanical drugs and preparations, 5th ed. London 1941