1. Environmental chemistry of dyes and pigments;Reife,1996
2. The problem of colour, the dye maker's view;Easton,XXXX
3. Zollinger H. In: Eblel HF, Brenzinger CD, Editons. Colour chemistry, 1st ed., New York: VCH, 1987 [Chapter 16].
4. Chemical carcinogenesis;Searle,1976
5. A study of azo and nitro dyes for the selection of candidates for carcinogen bioassay