1. I. Johnson, Histochem. J., 30, 123–140 (1998).
2. A. S. Tatikolov, J. Photochem. Photobiol., C, 13, 55–90 (2012).
3. A. Mishra, R. K. Behera, P. K. Behera, B. K. Mishra, and G. B. Behera, Chem. Rev., 100, 1973–2011 (2000).
4. A. A. Ishchenko, Structure and Spectral Luminescence Properties of Polymethine Dyes [in Russian], Naukova Dumka, Kiev (1994).
5. D. Noukakis, M. Van der Auweraer, S. Toppet, and F. De Schryver, J. Phys. Chem., 99, 11860–11866 (1995).