@misc{indiciaecad290ad39e9,
  title = {Constant-concentration boundary condition: Lessons from the HYDROCOIN variable-density groundwater benchmark problem},
  author = {Leonard F. Konikow and W. E. Sanford and P.J. Campbell},
  year = {1997},
  doi = {10.1029/97wr01926},
  url = {https://pubs.usgs.gov/publication/70019475},
  note = {Source identifier: 70019475}
}