To cite package ‘submax’ in publications use:

Rosenbaum PR (2025). submax: Effect Modification in Observational Studies Using the Submax Method. R package version 1.1.5, https://CRAN.R-project.org/package=submax.

Corresponding BibTeX entry:

  @Manual{,
    title = {submax: Effect Modification in Observational Studies Using
      the Submax Method},
    author = {Paul R. Rosenbaum},
    year = {2025},
    note = {R package version 1.1.5},
    url = {https://CRAN.R-project.org/package=submax},
  }