@misc{indiciaed7af257decc4,
  title = {Using a Quadtree Algorithm To Assess Line of Sight},
  author = {Gonzalez, Joseph and Chamberlain, Robert and Tailor, Eric and Gutt, Gary},
  year = {2006},
  url = {https://ntrs.nasa.gov/citations/20100014100},
  note = {Source identifier: 20100014100}
}