To cite fsr in publications use:

To refer to its second version:

Anderson Chaves Carniel, Pedro Vinícius Almeida Borges de Venâncio, and Markus Schneider. 2023. fsr: An R package for fuzzy spatial data handling. Transactions in GIS, vol. 27, no. 3, pp. 900-927.<doi:https://doi.org/10.1145/3474717.3484255>

To refer to its first version and the implementation of fuzzy spatial inference models:

Anderson Chaves Carniel, Felippe Galdino, Juliana Strieder Philippsen, and Markus Schneider. 2021. Handling Fuzzy Spatial Data in R Using the fsr Package. In Proceedings of the 29th International Conference on Advances in Geographic Information Systems (SIGSPATIAL '21), pp. 526–535.<doi:https://doi.org/10.1145/3474717.3484255>

Corresponding BibTeX entries:

  @Article{fsr23TGIS,
    title = {{fsr}: An {R} package for fuzzy spatial data handling},
    author = {Anderson C. Carniel and Pedro V. A. B. Venâncio and
      Markus Schneider},
    journal = {Transactions in GIS},
    year = {2023},
    volume = {27},
    number = {3},
    pages = {900--927},
    doi = {10.1111/tgis.13044},
  }

  @InProceedings{fsr21SIGSPATIAL,
    title = {Handling Fuzzy Spatial Data in {R} using the {fsr}
      Package},
    author = {Anderson C. Carniel and Felippe Galdino and Juliana S.
      Philippsen and Markus Schneider},
    booktitle = {ACM SIGSPATIAL International Conference on Advances in
      Geographic Information Systems},
    year = {2021},
    pages = {526--535},
    doi = {10.1145/3474717.3484255},
  }