To cite package ‘oosse’ in publications use:

  Hawinkel S (2024). _oosse: Out-of-Sample R² with Standard Error
  Estimation_. R package version 1.0.11,
  <https://github.com/sthawinke/oosse>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {oosse: Out-of-Sample R² with Standard Error Estimation},
    author = {Stijn Hawinkel},
    year = {2024},
    note = {R package version 1.0.11},
    url = {https://github.com/sthawinke/oosse},
  }