@misc{indiciaeef6fb43c8e6d,
  title = {Counter-rotating propellant analysis using a frequency domain panel method},
  author = {Williams, Marc H. and Cho, Jinsoo},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19900053882},
  note = {Source identifier: 19900053882}
}