@misc{indiciae3e1a4094dfa2,
  title = {Level dynamics for a periodically driven quantum system.},
  author = {R Scharf and M Kus},
  year = {1989},
  doi = {10.1103/physreva.40.4774},
  url = {https://pubmed.ncbi.nlm.nih.gov/9902725/},
  note = {Source identifier: 9902725}
}