To cite package ‘rollupTree’ in publications use:

  Jenkins JS (2025). _rollupTree: Perform Recursive Computations_. R
  package version 0.1.0,
  <https://CRAN.R-project.org/package=rollupTree>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {rollupTree: Perform Recursive Computations},
    author = {James Steven Jenkins},
    year = {2025},
    note = {R package version 0.1.0},
    url = {https://CRAN.R-project.org/package=rollupTree},
  }