@misc{indiciae9196fd64404a,
  title = {Phase constrast techniques for wavefront sensing and calibration in adaptive optics},
  author = {Bloemhof, E. E. and Wallace, J. K.},
  year = {2003},
  url = {https://ntrs.nasa.gov/citations/20060028507},
  note = {Source identifier: 20060028507}
}