@misc{indiciae476802af34da,
  title = {A Low Cost Electrostatically Focused TWT},
  author = {Vancil, Bernard K. and Wintucky, Edwin G. and Williams, W. D.},
  year = {2002},
  url = {https://ntrs.nasa.gov/citations/20020073072},
  note = {Source identifier: 20020073072}
}