To cite package ‘sapo’ in publications use:

  Godoy LdC (2024). _sapo: Spatial Association of Different Types of
  Polygon_. R package version 0.8.0,
  <https://CRAN.R-project.org/package=sapo>.

A BibTeX entry for LaTeX users is

  @Manual{sapo-package,
    title = {{sapo}: Spatial Association of Different Types of Polygon},
    author = {Lucas da Cunha Godoy},
    year = {2024},
    url = {https://CRAN.R-project.org/package=sapo},
    note = {R package version 0.8.0},
  }

  Godoy LdC, Assunção RM, Butler KA (2022). “Testing the spatial
  association of different types of polygons.” _Spatial Statistics_,
  *51*(3), 100695. ISSN 2211-6753, doi:10.1016/j.spasta.2022.100695
  <https://doi.org/10.1016/j.spasta.2022.100695>,
  <https://doi.org/10.1016/j.spasta.2022.100695>.

A BibTeX entry for LaTeX users is

  @Article{sapo-paper,
    title = {Testing the spatial association of different types of polygons},
    author = {Lucas da Cunha Godoy and Renato Martins Assunção and Kevin A. Butler},
    journal = {Spatial Statistics},
    year = {2022},
    issn = {2211-6753},
    volume = {51},
    number = {3},
    pages = {100695},
    doi = {10.1016/j.spasta.2022.100695},
    url = {https://doi.org/10.1016/j.spasta.2022.100695},
  }