@misc{indiciae047f948e9044,
  title = {Fresnel cup reflector directs maximum energy from light source},
  author = {Laue, E. G. and Youngberg, C. L.},
  year = {1964},
  url = {https://ntrs.nasa.gov/citations/19630000041},
  note = {Source identifier: 19630000041}
}