@misc{indiciae981ace951610,
  title = {Vortex equations: Singularities, numerical solution, and axisymmetric vortex breakdown},
  author = {Bossel, H. H.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19720020636},
  note = {Source identifier: 19720020636}
}