To cite couplr in publications use:

Colling G (2026). couplr: Optimal Pairing and Matching via Linear Assignment. R package version 1.4.0, https://github.com/gcol33/couplr.

Corresponding BibTeX entry:

  @Manual{,
    title = {couplr: Optimal Pairing and Matching via Linear
      Assignment},
    author = {Gilles Colling},
    year = {2026},
    note = {R package version 1.4.0},
    url = {https://github.com/gcol33/couplr},
  }