Dukhopelnykov, Y., E. Bereznyak, A. Ivanov, A. Sudakov, M. Semenov, and V. Maleev. “Vibrational Spectra of Phenoxazine Derivatives Isolated in Ar Matrices. Experiment and Calculations”. Biophysical Bulletin, Vol. 2, no. 13, June 2003, pp. 16-22, https://periodicals.karazin.ua/biophysvisnyk/article/view/12354.