To cite package 'eva' in publications use:

Brian Bader, Jun Yan (2018), eva: Extreme Value Analysis with Goodness-of-Fit Testing. R package version 0.2.5.

Corresponding BibTeX entry:

  @Manual{,
    title = {eva: Extreme Value Analysis with Goodness-of-Fit Testing},
    author = {Brian Bader and Jun Yan},
    year = {2018},
    vers = {R package version 0.2.5},
  }