To cite package ‘ER’ in publications use:

Liland K (2022). ER: Effect + Residual Modelling. R package version 1.1.1, https://github.com/khliland/er.

Corresponding BibTeX entry:

  @Manual{,
    title = {ER: Effect + Residual Modelling},
    author = {Kristian Hovde Liland},
    year = {2022},
    note = {R package version 1.1.1},
    url = {https://github.com/khliland/er},
  }