@misc{indiciae0471094f8a18,
  title = {Freeform Optical Design of Two Mirror Telescopes},
  author = {Howard, Joseph and West, Garrett and Trumper, Isaac and Anderson, Alex},
  year = {2015},
  url = {https://ntrs.nasa.gov/citations/20160002427},
  note = {Source identifier: 20160002427}
}