@misc{indiciaef8603f832a3e,
  title = {Comparative quantizations of (2+1)-dimensional gravity.},
  author = {S Carlip and JE Nelson},
  year = {1995},
  doi = {10.1103/physrevd.51.5643},
  url = {https://pubmed.ncbi.nlm.nih.gov/10018320/},
  note = {Source identifier: 10018320}
}