@misc{indiciaef8e05d4f22c5,
  title = {Time-evolution operator and Lie algebras.},
  author = {FM Fernández},
  year = {1989},
  doi = {10.1103/physreva.40.41},
  url = {https://pubmed.ncbi.nlm.nih.gov/9901866/},
  note = {Source identifier: 9901866}
}