1. Steinegger E, Hänsel R (1972) Lehrbuch der Pharmakognosie. 3. Auflage. Berlin: Springer-Verlag, pp 450–451
2. Anonymous (1948) The Wealth of India. A Dictionary of Indian Raw Materials and Industrial Products. Vol. I. New Delhi: Council of Scientific & Industrial Research, pp 121–122
3. Hänsel R, Keller K, Rimpler H, Schneider G, eds. (1992) Hagers Handbuch der Pharmazeutischen Praxis. 5th edn. Vierter Band: Drogen A-D. Berlin: Springer-Verlag, pp 368–370
4. Roth L, Daunderer M, Kormann K (1984) Giftpflanzen-Pflanzengifte. Landsberg, München: Ecomed Verlagsgesellschaft mbH, pp IV–1A, 49–50; IV–3S, 4–5
5. Reynolds JEF, Prasad AB, eds. (1982) Martindale The Extra Pharmacopoeia. 28th edn. London: The Pharmaceutical Press, p 105