@misc{indiciae281e4c7b860e,
  title = {Simple performance model for ring and line cusp ion thrusters},
  author = {Brophy, J. R. and Wilbur, P. J.},
  year = {1985},
  url = {https://ntrs.nasa.gov/citations/19860026500},
  note = {Source identifier: 19860026500}
}