@misc{indiciaebc8e686199b7,
  title = {Ermakov systems, exact solution, and geometrical angles and phases.},
  author = {M Maamache},
  year = {1995},
  doi = {10.1103/physreva.52.936},
  url = {https://pubmed.ncbi.nlm.nih.gov/9912331/},
  note = {Source identifier: 9912331}
}