@misc{indiciaecb0f70dd4148,
  title = {Decoherence in quantum cosmology.},
  author = {JJ Halliwell},
  year = {1989},
  doi = {10.1103/physrevd.39.2912},
  url = {https://pubmed.ncbi.nlm.nih.gov/9959520/},
  note = {Source identifier: 9959520}
}