@article{dougherty1998efficient,
  title={Efficient 3-D data inversion: Soil characterization and moisture monitoring from crosswell GPR at a Vermont test site},
  author={Margaret (Maggie) Eppstein and David E. Dougherty},
  journal={Water Resources Research},
  volume={34},
  number={8},
  pages={1889-1900},
  journalpage={http://www.cs.uvm.edu/~meppstei/personal/WRR98scanned.pdf},
  year={1998},
  citations={}
}