@misc{indiciae7779ee422051,
  title = {Canonical quantization of (2+1)-dimensional gravity.},
  author = {H Waelbroeck},
  year = {1994},
  doi = {10.1103/physrevd.50.4982},
  url = {https://pubmed.ncbi.nlm.nih.gov/10018150/},
  note = {Source identifier: 10018150}
}