Borysyuk, V. I.; Yashchuk, V. M.; Naumenko, A. P.; Stanova, A. V.; Gerasova, V. G.; Gerasov, A. O.; Kovtun, Y. P.; Shandura, M. P.; Kachkovsky, O. D. Influence of Surplus Negative Charge on Absorption and Fluorescence Excitation Spectra of Asymmetric Polymethine Dyes. Ukr. J. Phys. 2019, 60, 593.