@misc{indiciae4d07f2316487,
  title = {Second-order eikonal exchange amplitudes.},
  author = {TT Gien},
  year = {1986},
  doi = {10.1103/physreva.34.3646},
  url = {https://pubmed.ncbi.nlm.nih.gov/9897706/},
  note = {Source identifier: 9897706}
}