@misc{indiciaed60d66661c6b,
  title = {Active vibration control for flexible rotor by optimal direct-output feedback control},
  author = {Nonami, K. and Dirusso, E. and Fleming, D. P.},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19900059167},
  note = {Source identifier: 19900059167}
}