@misc{indiciae9850c57ab4ca,
  title = {The augmented Lagrangian method for estimating the diffusion coefficient in an elliptic equation},
  author = {Ito, K. and Kunisch, K.},
  year = {1987},
  url = {https://ntrs.nasa.gov/citations/19880047580},
  note = {Source identifier: 19880047580}
}