@misc{indiciae433e5775ecb2,
  title = {Phenomenological model describing orificed, hollow cathode operation},
  author = {Siegfried, D. E. and Wilbur, P. J.},
  year = {1983},
  url = {https://ntrs.nasa.gov/citations/19830034058},
  note = {Source identifier: 19830034058}
}