@article{article566312af,
title   = {Spectra of Electronic Excitations in Graphene Near Coulomb Impurities},
author = {Breev, A. I. and Gitman, Dmitri Maximovitch and Voronov, B. L.},
year = {2020},
doi = {10.1134/S1063776120030127},
journal   = {Journal of Experimental and Theoretical Physics}
}