@article{dougherty1996simultaneous,
  title={Simultaneous estimation of transmissivity values and zonation},
  author={Margaret (Maggie) Eppstein and David E. Dougherty},
  journal={Water Resources Research},
  volume={32},
  number={11},
  pages={3321-3336},
  journalpage={http://www.cs.uvm.edu/~meppstei/personal/96WR02283.pdf},
  year={1996},
  citations={}
}