@misc{indiciae05cc1b52484c,
  title = {Quantum dynamics, metastable states, and contractive semigroups.},
  author = {EC Sudarshan},
  year = {1992},
  doi = {10.1103/physreva.46.37},
  url = {https://pubmed.ncbi.nlm.nih.gov/9907833/},
  note = {Source identifier: 9907833}
}