@article{Kovalchuk:2016Pg,
  author = "Kovalchuk, Nataliia",
  title = "{Measurement of the cross-section ratio $\sigma \psi (2S)/\sigma J/\psi$  in deep inelastic exclusive ep scattering at HERA}",
  doi = "10.22323/1.247.0078",
  journal = "PoS",
  year = 2016,
  volume = "DIS2015",
  pages = "078"
}