@misc{indiciae5ce5cb338e9c,
  title = {Nonlinear filtering techniques with application to strapdown computation},
  author = {Lee, J. S. and Tung, F. F.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19700052951},
  note = {Source identifier: 19700052951}
}