@misc{indiciae9737269c6231,
  title = {A study of commuter airplane design optimization},
  author = {Keppel, B. V. and Eysink, H. and Hammer, J. and Hawley, K. and Meredith, P. and Roskam, J.},
  year = {1978},
  url = {https://ntrs.nasa.gov/citations/19780017135},
  note = {Source identifier: 19780017135}
}