To cite package ‘extr’ in publications use:

  Hakoyama H (2026). “Confidence intervals for extinction risk:
  Validating population viability analysis with limited data.” _Methods
  in Ecology and Evolution_, *17*, 1837-1850.
  doi:10.1111/2041-210X.70294
  <https://doi.org/10.1111/2041-210X.70294>. Preprint available at
  https://doi.org/10.48550/arXiv.2509.09965.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Confidence intervals for extinction risk: Validating population viability analysis with limited data},
    author = {Hiroshi Hakoyama},
    year = {2026},
    journal = {Methods in Ecology and Evolution},
    volume = {17},
    pages = {1837--1850},
    doi = {10.1111/2041-210X.70294},
    note = {Preprint available at https://doi.org/10.48550/arXiv.2509.09965},
  }