Quasicrossings of potential curves in the two-Coulomb-center problem Viktor M. Khmara, Michal Hnatič, Volodymyr Yu. Lazur and Oleksandr K. Reity Eur. Phys. J. D, 72 2 (2018) 39 Published online: 22 February 2018 DOI: 10.1140/epjd/e2017-80227-2