@misc{indiciae17cf7fba81bb,
  title = {An inverse method with regularity condition for transonic airfoil design},
  author = {Zhu, Ziqiang and Xia, Zhixun and Wu, Liyi},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19920004751},
  note = {Source identifier: 19920004751}
}