To cite package ‘SPIChanges’ in publications use:

  Blain G, Sobierajski G, Martins L, Sparks A (2025). _SPIChanges:
  Improves the Interpretation of the Standardized Precipitation Index
  Under Changing Climate Conditions_. R package version 0.1.0,
  <https://CRAN.R-project.org/package=SPIChanges>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {SPIChanges: Improves the Interpretation of the Standardized Precipitation
Index Under Changing Climate Conditions},
    author = {Gabriel Constantino Blain and Graciela R. Sobierajski and Leticia L. Martins and Adam H. Sparks},
    year = {2025},
    note = {R package version 0.1.0},
    url = {https://CRAN.R-project.org/package=SPIChanges},
  }