@misc{indiciaef2dbb0ed89ca,
  title = {Flight with lift modulation inside a planetary atmosphere},
  author = {Vinh, N. X. and Bletsos, N. A. and Culp, R. D. and Busemann, A.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19780030431},
  note = {Source identifier: 19780030431}
}