5. A.A. Ishchenko, Structure and Spectral and Luminescent Properties of Polymethine Dyes. Naukova Dumka, Kiev, 1994.
6. J.E. Wong, S. Schrader, H. Detert, S. Katholy, L. Brehmer, Proceedings of the «European Conference on Organic Electronics and Related Phenomena 2001» // University of Potsdam, 18-21 November 2001, p.168.