To cite package ‘calba’ in publications use:

  Katabuchi M (2025). _calba: Efficient Neighborhood Basal Area Metrics
  for Trees_. R package version 0.1.2.900,
  <https://github.com/mattocci27/calba>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {calba: Efficient Neighborhood Basal Area Metrics for Trees},
    author = {Masatoshi Katabuchi},
    year = {2025},
    note = {R package version 0.1.2.900},
    url = {https://github.com/mattocci27/calba},
  }