To cite package ‘esas’ in publications use:

  Huybrechts P, Vanermen N (2026). _esas: Read and Process Data from
  European Seabirds At Sea_. R package version 0.0.0.9000,
  <https://github.com/inbo/esas>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {esas: Read and Process Data from European Seabirds At Sea},
    author = {Pieter Huybrechts and Nicolas Vanermen},
    year = {2026},
    note = {R package version 0.0.0.9000},
    url = {https://github.com/inbo/esas},
  }