@misc{indiciae19535f1590bd,
  title = {Reduced density matrices and decoherence in quantum cosmology.},
  author = {R Laflamme and J Louko},
  year = {1991},
  doi = {10.1103/physrevd.43.3317},
  url = {https://pubmed.ncbi.nlm.nih.gov/10013283/},
  note = {Source identifier: 10013283}
}