To cite package ‘spm’ in publications use:

Li J (2025). spm: Spatial Predictive Modeling. R package version 1.2.3, https://CRAN.R-project.org/package=spm.

Corresponding BibTeX entry:

  @Manual{,
    title = {spm: Spatial Predictive Modeling},
    author = {Jin Li},
    year = {2025},
    note = {R package version 1.2.3},
    url = {https://CRAN.R-project.org/package=spm},
  }