@misc{indiciaee638a527713f,
  title = {Higher Harmonic Control for Tiltrotor Vibration Reduction},
  author = {Nixon, Mark W. and Kvaternik, Raymond G. and Settle, T. Ben},
  year = {1997},
  url = {https://ntrs.nasa.gov/citations/20040110400},
  note = {Source identifier: 20040110400}
}