1. Structure and Properties of Laser Dyes
2. Handbook of Fluorescent Probes and Research Products;Haugland,2002
3. New fluorescent dyes in the red region for biodiagnostics
4. Herrmann, R.; Josel, H. P.; Drexhage, K. H.; Arden-Jacob, J. US Patent 5,750,409, 1998.
5. Benson, S. C.; Lam, J. Y. L.; Menchen, S. M. US Patent 5,936,087, 1999.