@misc{indiciaed568b81435f7,
  title = {Numerical simulation of two-grid ion optics using a 3D code},
  author = {Anderson, J. R. and Katz, I.},
  year = {2004},
  url = {https://ntrs.nasa.gov/citations/20060040165},
  note = {Source identifier: 20060040165}
}