@misc{indiciae7adce9b6925c,
  title = {Kalman filtering for spacecraft attitude estimation},
  author = {Lefferts, E. J. and Markley, F. L. and Shuster, M. D.},
  year = {1982},
  url = {https://ntrs.nasa.gov/citations/19820034231},
  note = {Source identifier: 19820034231}
}