@misc{indiciae4b1047d0cb68,
  title = {Application of the conjugate-gradient method to ground-water models},
  author = {T.A. Manteuffel and D.B. Grove and Leonard F. Konikow},
  year = {1984},
  doi = {10.3133/wri834009},
  url = {https://pubs.usgs.gov/publication/wri834009},
  note = {Source identifier: wri834009}
}