1. Kiritikar KR, Basu BD (1959) Indian Medicinal Plants, vol 1. Jayyed, Allahabad (India)
2. Salikutty J, Peter KV (1985) Economy Botany, pp 68?73
3. Verghese J (1989) Perfumer & Flavorist 14:69?70
4. Joseph P, Peter KV, Gopalakrishnan PK (1981) Indian Horticulture, pp 2 and 27
5. Deshmukh SK, Jain PC, Agrawal SC (1986) Fitotherapial LVII, 295?297