To cite package ‘treefit’ in publications use:

  Hayamizu M, Sutou K, Suzuki R, Ishii H (2025). _treefit: The First
  Software for Quantitative Trajectory Inference_. R package version
  1.0.3, <https://CRAN.R-project.org/package=treefit>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {treefit: The First Software for Quantitative Trajectory Inference},
    author = {Momoko Hayamizu and Kouhei Sutou and Ryohei Suzuki and Hiromi Ishii},
    year = {2025},
    note = {R package version 1.0.3},
    url = {https://CRAN.R-project.org/package=treefit},
  }