@misc{indiciaeb10dec57e3cf,
  title = {Third quantization and the Wheeler-DeWitt equation.},
  author = {M McGuigan},
  year = {1988},
  doi = {10.1103/physrevd.38.3031},
  url = {https://pubmed.ncbi.nlm.nih.gov/9959050/},
  note = {Source identifier: 9959050}
}