To cite 'approxOT' in publications use:

  Dunipace E (2024). _approxOT: approximate optimal transport_. R
  package version 1.1, <https://github.com/ericdunipace/approxOT>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {{approxOT}: approximate optimal transport},
    author = {Eric A. Dunipace},
    year = {2024},
    note = {R package version 1.1},
    url = {https://github.com/ericdunipace/approxOT},
  }