To cite package ‘flexMatch’ in publications use:

  Kazakov A (2026). _flexMatch: Flexible Matching for Stacked
  Difference-in-Differences_. R package version 0.1.0,
  <https://CRAN.R-project.org/package=flexMatch>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {flexMatch: Flexible Matching for Stacked Difference-in-Differences},
    author = {Aleksandr Kazakov},
    year = {2026},
    note = {R package version 0.1.0},
    url = {https://CRAN.R-project.org/package=flexMatch},
  }