@misc{indiciae319c85383b08,
  title = {On the two-photon-exchange contribution to pi 0-->e+e- gamma.},
  author = {G Tupper},
  year = {1987},
  doi = {10.1103/physrevd.35.1726},
  url = {https://pubmed.ncbi.nlm.nih.gov/9957844/},
  note = {Source identifier: 9957844}
}