@misc{indiciae9ea8f20d8d3c,
  title = {Kalman-Filter Estimation Of Unmeasured Output Variables},
  author = {Gilyard, Glenn B. and Alag, Gurbux S.},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19930000234},
  note = {Source identifier: 19930000234}
}