@misc{indiciaecfe63dd74bd7,
  title = {SOFIP: A Short Orbital Flux Integration Program},
  author = {Stassinopoulos, E. G. and Hebert, J. J. and Butler, E. L. and Barth, J. L.},
  year = {1979},
  url = {https://ntrs.nasa.gov/citations/19790015709},
  note = {Source identifier: 19790015709}
}