@article{9405,
  author = {M. Gavrila and A. Costescu},
  title = {Retardation in the Elastic Scattering of Photons by Atomic Hydrogen},
  year = {1970},
  journal = {Physical Review A},
  volume = {2},
  pages = {1752-1758},
  month = {Jan-11-1970},
  issn = {0556-2791},
  url = {http://link.aps.org/doi/10.1103/PhysRevA.2.1752},
  doi = {10.1103/PhysRevA.2.1752},
}