@misc{indiciaee970e20e3f77,
  title = {Minimum Induced Drag of Nonplanar Wings},
  author = {Ku, T. J. and Kuhlman, J. M.},
  year = {1983},
  url = {https://ntrs.nasa.gov/citations/19830000078},
  note = {Source identifier: 19830000078}
}