To cite package 'a4a' in publications use:

  Colin Millar and Ernesto Jardim (2026). a4a: A flexible and robust
  stock assessment framework. R package version 1.9.99-002.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {a4a: A flexible and robust stock assessment framework},
    author = {Colin Millar and Ernesto Jardim},
    year = {2026},
    note = {R package version 1.9.99-002},
  }

  Ernesto Jardim, Colin P. Millar, Iago Mosqueira, Finlay Scott,
  Giacomo Chato Osio, Marco Ferretti, Nekane Alzorriz, Alessandro Orio,
  What if stock assessment is as simple as a linear model? The a4a
  initiative, ICES Journal of Marine Science, Volume 72, Issue 1,
  January 2015, Pages 232–236, https://doi.org/10.1093/icesjms/fsu050.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {What if stock assessment is as simple as a linear model? The a4a initiative},
    journal = {ICES Journal of Marine Science},
    volume = {72},
    number = {1},
    pages = {232-236},
    year = {2015},
    author = {Ernesto Jardim and Colin P. Millar and Iago Mosqueira and Finlay Scott and G. Chato Osio and Marco Ferretti and Nekane Alzorriz and Alessandro Orio},
  }