REFERENCES
- Dũng , N. X. , Tho , P. T.T. , Dàn , N. V. and Leclercq , P. A. 1989 . Chemical composition of the oil of Ageratum conyzoides L. from Vietnam . J. Essent. Oil Res. , 1 : 135 – 136 .
- Hajji , S. , Beliveau , J. , Simon , D. Z. , Salvador , R. , Aube , C. and Conti , A. 1989 . A rapid method for prefractionation of essential oils . J. Liq. Chromatogr. , 7 ( 3 ) : 2671 – 2677 .