1. 1. A. Afkhami and A. R. Zarei, Talanta, 2004, 62, 559.
2. 2. K. Mosinska, Chem. Anal., 1980, 25, 859.
3. 3. T. Hasan, Anal. Lett., 1998, 21, 633.
4. Colorimetric Determination of Some Important Hydrazine Derivatives
5. 5. B. C. Verma, N. Sharma, N. K. Sharma, U. Sharma, and R. K. Sood, Natl. Acad. Sci. Lett., 1986, 9, 47.