1. (a) C.C. Leznoff, A.B.P. Lever, (Eds.), Phthalocyanines: Properties and Applications, vols. 1-4, VCH Publications, New York, 1989, 1993, 1996
2. (b) A. Thomas, Phthalocyanine Research and Applications, CRS Press, Boca Raton, 1990
3. (c) F.H. Moser, A.L. Thomas, The Phthalocyanines, CRC, Boca Raton, FL, 1983.
4. Industrial Organic Pigments: Production, Properties, Weinheim, New York;Herbst,1993
5. Industrial Application of Phthalocyanines;Gregory;J. Porhyr. Phthalocyan.,2000