@misc{indiciaea01536b17d9d,
  title = {Trapping boundary and field-line motion during geomagnetic storms.},
  author = {Kaufmann, R. L. and Horng, J.-T. and Konradi, A.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19720049292},
  note = {Source identifier: 19720049292}
}