References
- Venkataraman , K. 1977 . ‘The analytical chemistry of synthetic dyes’ , 25 – 55 . U.S.A. : A Wiley Interecience Publication . Chapter II
- Copius-Pureboom , J. W. and Beekes , H. W. 1965 . J. Chromatog. , 20 : 43
- Srivastava , S. P. , Chauhan , L. S. and Dua , V. K. 1980 . J. Liq. Chromatography , 3 ( 12 ) : 1929