REFERENCES
- Crano , C. J. C. & Guglielmetti , R. J. (Eds.), ( 1999 ). Organic Photochromic and Thermochromic Compounds , Kluwer Academic/Plenum Publishers : New York , Vol. 1 & 2 .
- Christie , R. M. , Chi L. J. , Spark , R. A. , Morgan , K. M. , Boyd , A. S. F. , & Lycka , A. ( 2004 ). J. Photochem. Photobiol. A.: Chem. , 169 , 37 – 45 .
- Toshio , H. , Okada Y. , & Morita , Z. ( 2003 ). Dyes and Pigments, 59 , 25 – 41 .
- Standard Methods for the Determination of the Colour Fastness of Textiles and Leather, Fifth edition, 1990 , The Society of Dyers and Colourists , Perkin House , Bradford, BD1 2JB , UK .