@misc{indiciae0d96dbcf3d4b,
  title = {A suboptimum filter with modified covariance},
  author = {Fulmer, C. R. and Teng, L.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19700068485},
  note = {Source identifier: 19700068485}
}