@misc{indiciaefad5fd5559d8,
  title = {Covariant Feynman rules at finite temperature: Time-path formulation.},
  author = {RJ Furnstahl and BD Serot},
  year = {1991},
  doi = {10.1103/physrevc.44.2141},
  url = {https://pubmed.ncbi.nlm.nih.gov/9967636/},
  note = {Source identifier: 9967636}
}