To cite package ‘S4DM’ in publications use:

  Maitner B, Richards R, Carlson B, Drake J, Merow C (2025). _S4DM:
  Small Sample Size Species Distribution Modeling_. R package version
  0.0.1, <https://github.com/bmaitner/s4dm>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {S4DM: Small Sample Size Species Distribution Modeling},
    author = {Brian S. Maitner and Robert L. Richards and Ben S. Carlson and John M. Drake and Cory Merow},
    year = {2025},
    note = {R package version 0.0.1},
    url = {https://github.com/bmaitner/s4dm},
  }