@misc{indiciaec7f19b5fb9ec,
  title = {Leading-edge vortex research: Some nonplanar concepts and current challenges},
  author = {Campbell, J. F. and Osborn, R. F.},
  year = {1986},
  url = {https://ntrs.nasa.gov/citations/19860017720},
  note = {Source identifier: 19860017720}
}