@misc{indiciae848938e41e06,
  title = {General relativity without the metric.},
  author = {R Capovilla and T Jacobson and J Dell},
  year = {1989},
  doi = {10.1103/physrevlett.63.2325},
  url = {https://pubmed.ncbi.nlm.nih.gov/10040860/},
  note = {Source identifier: 10040860}
}