To cite couplr in publications use:

Colling G (2026). couplr: Optimal Pairing and Matching via Linear Assignment. doi:10.32614/CRAN.package.couplr. R package version 1.9.0, https://gillescolling.com/couplr/.

Corresponding BibTeX entry:

  @Manual{colling2026couplr,
    title = {couplr: Optimal Pairing and Matching via Linear
      Assignment},
    author = {Gilles Colling},
    year = {2026},
    note = {R package version 1.9.0},
    doi = {10.32614/CRAN.package.couplr},
    url = {https://gillescolling.com/couplr/},
  }