@misc{indiciae6cbcd2064779,
  title = {Off-shell amplitudes for open bosonic strings.},
  author = {C Varughese and WI Weisberger},
  year = {1988},
  doi = {10.1103/physrevd.37.981},
  url = {https://pubmed.ncbi.nlm.nih.gov/9958767/},
  note = {Source identifier: 9958767}
}