To cite fsr in publications use:

Carniel AC, Galdino F, Philippsen JS, Schneider M (2021). “Handling Fuzzy Spatial Data in R using the fsr Package.” In ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems.

Corresponding BibTeX entry:

  @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},
  }