@misc{indiciae9cc87a7087bd,
  title = {Quantum Einstein-Maxwell fields: A unified viewpoint from the loop representation.},
  author = {R Gambini and J Pullin},
  year = {1993},
  doi = {10.1103/physrevd.47.r5214},
  url = {https://pubmed.ncbi.nlm.nih.gov/10015590/},
  note = {Source identifier: 10015590}
}