@misc{indiciae19ef41c96e08,
  title = {Vortex age as a wake turbulence scaling parameter},
  author = {Marchman, J. F., III and Marshall, J. R.},
  year = {1974},
  url = {https://ntrs.nasa.gov/citations/19740035995},
  note = {Source identifier: 19740035995}
}