To cite package ‘photobiologyFlecks’ in publications use:

  Aphalo P, Durand M (2026). _photobiologyFlecks: Analysis of sun- and
  shade flecks_. R package version 0.0.0.9000,
  <https://github.com/aphalo/photobiologyflecks>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {photobiologyFlecks: Analysis of sun- and shade flecks},
    author = {Pedro J. Aphalo and Maxime Durand},
    year = {2026},
    note = {R package version 0.0.0.9000},
    url = {https://github.com/aphalo/photobiologyflecks},
  }