@misc{indiciae97c33362d76b,
  title = {Electrostatic ion thruster optics calculations},
  author = {Whealton, John H. and Kirkman, David A. and Raridon, R. J.},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19920066507},
  note = {Source identifier: 19920066507}
}