@misc{indiciae9dea1022fe5a,
  title = {Estimating the theoretical semivariogram from finite numbers of measurements},
  author = {Li Zheng and Stephen E. Silliman},
  year = {2000},
  doi = {10.1029/1999wr900270},
  url = {https://pubs.usgs.gov/publication/70023126},
  note = {Source identifier: 70023126}
}