1. S. Arctander,Perfume and flavour materials of natural origin, Elizabeth, New Jersey, USA, (1960), p. 200.
2. K. H. C. Baser, M. Kurkzuoglu, and T. Ozek,J. Essent Oil Res.,4, 133 (1992).
3. C. K. Atal and B. M. Kapur,Cultivation and utilisation of aromatic plants, Regional Research Laboratory, CSIR, Jamu-Tawi, 1982, pp. 683, 742.