1. Dewick PM, Shaw JMH (1988) Podophyllums. Garden 113(5):233–238
2. Dewick PM (1996) Tumour inhibitors from plants. In: Evans WC, Trease GE, Evans WC (eds) Pharmacognosy, 14th edn. WB Saunders, London
3. Cordell GA, Farnsworth NR, Beecher CWW, Soejarto DD, Kinghorn AD, Pezzuto JM, Wall ME, Wani MC, Brown DM, O’Neill MJ, Lewis JA, Tait RM, Harris TJR (1993) Novel strategies for the discovery of plant-derived anticancer agents. In: Kinghorn AD, Balandrin MF (eds) Human medicinal agents from plants. American Chemical Society, Washington, DC
4. The Pharmacopoeia of India (1955) Government of India Press, Calcutta, The Pharmacopoeia of India
5. Karnick CR (1994) Pharmacopoeial standards of herbal plants, vol I. Sri Satguru Publications, New Delhi