@misc{indiciae81f783815757,
  title = {Generalized Coleman-Hepp model and quantum coherence.},
  author = {K Hiyama and S Takagi},
  year = {1993},
  doi = {10.1103/physreva.48.2586},
  url = {https://pubmed.ncbi.nlm.nih.gov/9909908/},
  note = {Source identifier: 9909908}
}