To cite package ‘graper’ in publications use:

  Velten B, Huber W (2018). _graper: Adaptive penalization in
  high-dimensional regression and classification with external
  covariates using variational Bayes_. R package version 1.21.0,
  <https://bioconductor.org/packages/graper>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {graper: Adaptive penalization in high-dimensional regression and
classification with external covariates using variational Bayes},
    author = {Britta Velten and Wolfgang Huber},
    year = {2018},
    note = {R package version 1.21.0},
    url = {https://bioconductor.org/packages/graper},
  }