@misc{indiciae518f67b9964c,
  title = {Efficient solution of unsteady transonic flows about airfoils},
  author = {Ballhaus, W. F. and Goorjian, P. M.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19770024143},
  note = {Source identifier: 19770024143}
}