@misc{indiciaec5621e6e5d23,
  title = {Higher-order adiabatic approximations for classical evolution.},
  author = {Z Wu},
  year = {1989},
  doi = {10.1103/physreva.40.6852},
  url = {https://pubmed.ncbi.nlm.nih.gov/9902094/},
  note = {Source identifier: 9902094}
}