@misc{indiciaeb425b0e79d6d,
  title = {Interaction between rotors of a counter rotating propeller},
  author = {Chung, Jin-Deog and Hough, Joseph and Nagel, Robert T.},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19910027866},
  note = {Source identifier: 19910027866}
}