1. K. Venkataraman, The Chemistry of Synthetic Dyes, I–VI, Academic, New York (1952–1972).
2. D. R. Waring and G. Hallas, The Chemistry and Application of Dyes, Plenum Press, New York (1999).
3. A. H. Sporer, Appl. Opt., 26, 1417–1422 (1987).
4. A. Latef, J. C. Bernede, and S. Benhinda, Thin Solid Films, 195, 289–300 (1990).
5. T. Mukherjee, Proc. Indian Natl. Sci. Acad., 66A, 239–265 (2000).