To cite package ‘aamatch’ in publications use:

  Rosenbaum P (2026). _aamatch: Artless Automatic or Artful
  Multivariate Matching for Observational Studies_. R package version
  0.4.5, <https://CRAN.R-project.org/package=aamatch>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {aamatch: Artless Automatic or Artful Multivariate Matching for
Observational Studies},
    author = {Paul Rosenbaum},
    year = {2026},
    note = {R package version 0.4.5},
    url = {https://CRAN.R-project.org/package=aamatch},
  }