@misc{indiciae92e61d4d6617,
  title = {MODOPTIM: A general optimization program for ground-water flow model calibration and ground-water management with MODFLOW},
  author = {Keith J. Halford},
  year = {2006},
  doi = {10.3133/sir20065009},
  url = {https://pubs.usgs.gov/publication/sir20065009},
  note = {Source identifier: sir20065009}
}