To cite the transport package in publications use:

  Dominic Schuhmacher, Björn Bähre, Nicolas Bonneel, Carsten
  Gottschlich, Valentin Hartmann, Florian Heinemann, Bernhard Schmitzer
  and Jörn Schrieber (2024). transport: Computation of Optimal
  Transport Plans and Wasserstein Distances. R package version 0.15-4.
  https://cran.r-project.org/package=transport

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {{transport}: Computation of Optimal Transport Plans and Wasserstein Distances},
    author = {Dominic Schuhmacher and Björn Bähre and Nicolas Bonneel and Carsten Gottschlich and Valentin Hartmann and Florian Heinemann and Bernhard Schmitzer and Jörn Schrieber},
    year = {2024},
    note = {R package version 0.15-4},
    url = {https://cran.r-project.org/package=transport},
  }