@misc{indiciae47bc9e73affa,
  title = {A Parameter Identification Method for Helicopter Noise Source Identification and Physics-Based Semi-Empirical Modeling},
  author = {Greenwood, Eric, II and Schmitz, Fredric H.},
  year = {2010},
  url = {https://ntrs.nasa.gov/citations/20100019161},
  note = {Source identifier: 20100019161}
}