@misc{indiciae0386624fdaab,
  title = {Wingtip mounted, counter-rotating proprotor for tiltwing aircraft},
  author = {Wechsler, James K. and Rutherford, John W.},
  year = {1995},
  url = {https://ntrs.nasa.gov/citations/20080004794},
  note = {Source identifier: 20080004794}
}