@misc{indiciae366f5247322e,
  title = {Candidate thruster technologies for NEP},
  author = {Brophy, J. and Oelson, S. and Hrbud, I. and Polk, J.},
  year = {2002},
  url = {https://ntrs.nasa.gov/citations/20060029732},
  note = {Source identifier: 20060029732}
}