1. Color Chemistry;Zollinger,1991
2. Diazo Chemistry. I. Aromatic and Heteroaromatic Compounds;Zollinger,1994
3. Ullman's Encyclopedia of Industrial Chemistry;Hertel,1987
4. Industrial Organic Pigments, Production, Properties and Applications;Herbst,1993
5. Spectrophotometric Determination of Elements;Marczenco,1976