@misc{indiciae0e5cecc029f0,
  title = {Visualization and Quantification of Rotor Tip Vortices in Helicopter Flows},
  author = {Kao, David L. and Ahmad, Jasim U. and Holst, Terry L.},
  year = {2015},
  url = {https://ntrs.nasa.gov/citations/20150000823},
  note = {Source identifier: 20150000823}
}