References
- Kracmarova , J. , Kovarova , A. and Stejskal , Z. 1988 . Pharmazie , 43 : 173 – 6 .
- Kracmar , J. , Kracmarova , J. and Kovarova , A. 1988 . Cesk. Farm. , 37 : 53 – 60 .
- Heinisch , G. , Matous , H. , Rank , W. and Wunderlich , R. 1981 . Sci. Pharm. , 49 : 472 – 82 .
- Clarke , E. G. C. , ed. 1988 . Isolation and Identification of Drugs , London : The Pharmaceutical Press .