@misc{indiciae23582a94a7f6,
  title = {A doubly charged ion model for ion thrusters},
  author = {Peters, R. R. and Wilbur, P. J. and Vahrenkamp, R. P.},
  year = {1976},
  url = {https://ntrs.nasa.gov/citations/19770030148},
  note = {Source identifier: 19770030148}
}