@misc{indiciae3236927dc5c3,
  title = {Relativistic material reference systems.},
  author = {JD Brown and D Marolf},
  year = {1996},
  doi = {10.1103/physrevd.53.1835},
  url = {https://pubmed.ncbi.nlm.nih.gov/10020176/},
  note = {Source identifier: 10020176}
}