@misc{indiciaec85a1801cac3,
  title = {Orthogonalization techniques of a direction cosine matrix.},
  author = {Bar-Itzhack, I. Y. and Fegley, K. A.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690064554},
  note = {Source identifier: 19690064554}
}