@misc{indiciaecfe8275842ff,
  title = {A three-dimensional viscous flow analysis for the helicopter tip vortex generation problem},
  author = {Lin, S. J. and Levy, R. and Shamroth, S. J. and Govindan, T. R.},
  year = {1985},
  url = {https://ntrs.nasa.gov/citations/19850025801},
  note = {Source identifier: 19850025801}
}