Pantalone F, Benedetti R, Piersimoni F (2019). Spbsampling: Spatially Balanced Sampling. R package version 1.3.0, https://CRAN.R-project.org/package=Spbsampling.

Corresponding BibTeX entry:

  @Manual{,
    title = {Spbsampling: Spatially Balanced Sampling},
    author = {Francesco Pantalone and Roberto Benedetti and Federica
      Piersimoni},
    year = {2019},
    note = {R package version 1.3.0},
    url = {https://CRAN.R-project.org/package=Spbsampling},
  }