@misc{indiciaee0216a788a07,
  title = {Progress in Air Separation with the Vortex Tube},
  author = {Balepin, V. and Rosolt, D. and Petley, D.},
  year = {1999},
  url = {https://ntrs.nasa.gov/citations/20040087159},
  note = {Source identifier: 20040087159}
}