@misc{indiciaee02a8c50c993,
  title = {Energetic particle recurrence and escape during solar cycle 20},
  author = {Gold, R. E. and Roelof, E. C.},
  year = {1980},
  url = {https://ntrs.nasa.gov/citations/19810028044},
  note = {Source identifier: 19810028044}
}