@misc{indiciae70c832924fe0,
  title = {Pair production in photon-photon collisions.},
  author = {Gould, R. J. and Schreder, G. P.},
  year = {1967},
  url = {https://ntrs.nasa.gov/citations/19670049004},
  note = {Source identifier: 19670049004}
}