@misc{indiciae419653b41e1b,
  title = {Simple performance model for ring and line cusp ion thrusters},
  author = {Brophy, J. R. and Wilbur, P. J.},
  year = {1984},
  url = {https://ntrs.nasa.gov/citations/19850034284},
  note = {Source identifier: 19850034284}
}