1. “Manual of cultivated plants”, 1958, p. 584 (New York: Macmillan Co.)
2. Chem. Abstr., 1963, p. 10413
3. & , “Indian medicinal plants”, revised by Blatter, E., et al., 1935, Vol. II, p. 897, (Allahabad: Lalit Mohan Basu)
4. “The wealth of India”, 1948, Vol. I, p. 160, (New Delhi: C.S.I.R.)