1. Color Chemistry;Zollinger,2003
2. The Analytical Chemistry of Synthetic Dyes;Venkataraman,1977
3. Determination of pH with surface-enhanced Raman fiber optic probes
4. Color Chemistry: Syntheses Properties and Applications of Organic Dyes and Pigments;Zollinger,1991
5. Azo and diazo chemistry;Zollinger;Interscience,1961