@misc{indiciae7a9b871606e0,
  title = {Feynman rules for the delta expansion.},
  author = {SS Pinsky and LM Simmons},
  year = {1988},
  doi = {10.1103/physrevd.38.2518},
  url = {https://pubmed.ncbi.nlm.nih.gov/9959414/},
  note = {Source identifier: 9959414}
}