@misc{indiciaec51a3a4e82d6,
  title = {Visualization and Quantification of Rotor Tip Vortices in Helicopter Flows},
  author = {Kao, David L. and Ahmad, Jasim Uddin and Holst, Terry L.},
  year = {2015},
  url = {https://ntrs.nasa.gov/citations/20190001785},
  note = {Source identifier: 20190001785}
}