@misc{indiciae6dd19f32c9d6,
  title = {The effect of an unsteady three-dimensional wake on elastic blade-flapping eigenvalues in hover},
  author = {Peters, David A. and Su, AY},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19900041173},
  note = {Source identifier: 19900041173}
}