Please cite both the package and the original article describing the
methods in your publications:

  Heming NM, Mota FMM, Alves-Ferreira G (2023). “SESraster: Raster
  Randomization for Null Hypothesis Testing.” R package version 0.7.0,
  <https://CRAN.R-project.org/package=SESraster>.

A BibTeX entry for LaTeX users is

  @Misc{,
    title = {SESraster: Raster Randomization for Null Hypothesis Testing},
    author = {Neander Marcel Heming and Flávio M. M. Mota and Gabriela Alves-Ferreira},
    year = {2023},
    note = {R package version 0.7.0},
    url = {https://CRAN.R-project.org/package=SESraster},
  }