SISA, Richard, et al. “OPTICAL PROPERTIES MODULATION OF CYANINE DYES IN ORGANIC SOLVENTS AND IN THE CRITICAL INTRACELLULAR PH WINDOW”. Studia Universitatis Babeș-Bolyai Chemia, vol. 64, no. 2, June 2019, pp. 547-53, doi:10.24193/subbchem.2019.2.47.