@misc{indiciae0c1fed6aebf4,
  title = {2-->n threshold production at the tree level.},
  author = {LS Brown and C Zhai},
  year = {1993},
  doi = {10.1103/physrevd.47.5526},
  url = {https://pubmed.ncbi.nlm.nih.gov/10015578/},
  note = {Source identifier: 10015578}
}