@misc{indiciae1db408f43ebc,
  title = {Admitting the Inadmissible: Adjoint Formulation for Incomplete Cost Functionals in Aerodynamic Optimization},
  author = {Arian, Eyal and Salas, Manuel D.},
  year = {1997},
  url = {https://ntrs.nasa.gov/citations/19980017376},
  note = {Source identifier: 19980017376}
}