@misc{indiciae901e59fdefaa,
  title = {1r2dinv: A finite-difference model for inverse analysis of two dimensional linear or radial groundwater flow},
  author = {Geoffrey C. Bohling and J.J. Butler},
  year = {2001},
  doi = {10.1016/s0098-3004(01)00036-x},
  url = {https://pubs.usgs.gov/publication/70023432},
  note = {Source identifier: 70023432}
}