Belko, N.V. et al. 2020. Spectrophotometrical purity and stability testing of a photosensitizer based on an indotricarbocyanine dye. Journal of the Belarusian State University. Physics. 3 (Oct. 2020), 17–23. DOI:https://doi.org/10.33581/2520-2243-2020-3-17-23.