REFERENCES
- Barder , T. J. , Wohlman , P. J. , Thrall , C. and DuBois , P. D. 1997 . LC-GC , 15 : 918 – 926 .
- Gerardi , S. (September/October)1997 . Pharmaceutical and Cosmetic Quality 28 – 31 . Yardley , PA : Carpe Diem Communications .
- Shen , Y. , Yang , Y. J. and Lee , M. L. 1997 . Anal. Chem. , 69 : 628 – 635 .
- Klute , R. C. 1998 . LC-GC , 6 : 92
- Dennis , D. R. and Jenke , J. 1996 . J Chromatog Sci , 34 : 362 – 367 .
- Mazhanoviski , E. B. , Biekin , S. G. and Sedov , A. I. 1979 . Farm-zh(Kiev) , 34 : 37 – 39 .
- Shingbal , D. M. and Joshi , S. V. 1985 . Indian Drugs , 22 ( 6 ) : 326 – 327 .
- Zheng , H. and Wu , W. 1987 . Yaowu-Fenxi-Zazhi. , 7 ( 3 ) : 180
- Lea , A. R. , Hailey , D. M. and Duguid , P. R. 1982 . J-Chromatogr. , 250 : 35 – 42 .
- Tsuneyoshi , T. J. 1986 . High. Resolut. Chromatogr. Commun , 9 : 252 – 254 .
- Greene , D. S. 1979 . Drug Dev. Ind. Pharm. , 5 ( 2 ) : 127 – 131 .
- 1995 . “ The United States Pharmacopeia ” . In 23-National Formulary 18 United States Pharmacopeial Convention 731 – 733 . MD : Rockville .