@misc{indiciaea90e5d367055,
  title = {Magnetic field directional discontinuities. I - Minimum variance errors},
  author = {Lepping, R. P. and Behannon, K. W.},
  year = {1980},
  url = {https://ntrs.nasa.gov/citations/19800067227},
  note = {Source identifier: 19800067227}
}