@misc{indiciaedef65c90b7ca,
  title = {Ray-tube integration in shooting and bouncing ray method},
  author = {Lee, S. W. and Ling, H. and Chou, R.},
  year = {1988},
  url = {https://ntrs.nasa.gov/citations/19890027781},
  note = {Source identifier: 19890027781}
}