M.D. Curmei, V. I. Melnyk, G. V. Klishevich, T. V. Bezrodna, V. V. Nesprava, and O. M. Roshchin, Electronic spectra and structure of 1- and 2-fluoronaphthalene impurity centers in crystalline naphthalene , Low Temp. Phys. 47, (2021) [Fiz. Nizk. Temp. 47, 454-461, (2021)] DOI: https://doi.org/10.1063/10.0004237.