@misc{indiciae87c1aa7f25d1,
  title = {VTOL in ground effect flows for closely spaced jets},
  author = {Migdal, D. and Hill, W. G., Jr. and Jenkins, R. C.},
  year = {1979},
  url = {https://ntrs.nasa.gov/citations/19810010569},
  note = {Source identifier: 19810010569}
}