@misc{indiciaec0e8ac491b61,
  title = {Development of advanced techniques for rotorcraft state estimation and parameter identification},
  author = {Hall, W. E., Jr. and Bohn, J. G. and Vincent, J. H.},
  year = {1980},
  url = {https://ntrs.nasa.gov/citations/19810010572},
  note = {Source identifier: 19810010572}
}