@misc{indiciae77626e45de15,
  title = {Declustering of clustered preferential sampling for histogram and semivariogram inference},
  author = {Ricardo A. Olea},
  year = {2007},
  doi = {10.1007/s11004-007-9108-6},
  url = {https://pubs.usgs.gov/publication/70030021},
  note = {Source identifier: 70030021}
}