To cite eyetools in publications use:

  Tom Beesley and Matthew Ivory, (). {eyetools}: Tools for eye data
  analysis. R package version 0.7.2.
  https://tombeesley.github.io/eyetools/

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {{eyetools}: Tools for eye data analysis},
    author = {Tom Beesley and Matthew Ivory},
    note = {R package version 0.7.2},
    url = {https://tombeesley.github.io/eyetools/},
  }