@misc{indiciae26e96f2bb4ef,
  title = {A three-dimensional viscous flow analysis for the helicopter tip vortex generation process about square and round tipped blades},
  author = {Lin, S.-J. and Levy, R. and Shamroth, S. J.},
  year = {1986},
  url = {https://ntrs.nasa.gov/citations/19860035211},
  note = {Source identifier: 19860035211}
}