@misc{indiciaef916dabe9f2b,
  title = {On the 'delta-equations' for vortex sheet evolution},
  author = {Rottman, James W. and Stansby, Peter K.},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19930047806},
  note = {Source identifier: 19930047806}
}