@article{gavrila:1967:esp,
     title = {Elastic scattering of photons by a hydrogen atom},
    author = {Gavrila, Mihai},
   journal = {Phys. Rev.},
    volume = {163},
    number = {1},
     pages = {147–155},
      year = {1967},
       doi = {10.1103/PhysRev.163.147},
 publisher = {American Physical Society}}