To cite evgam in publications use:

Youngman BD (2022). “evgam: An R Package for Generalized Additive Extreme Value Models.” Journal of Statistical Software, 103(3), 1–26. doi:10.18637/jss.v103.i03.

Corresponding BibTeX entry:

  @Article{,
    title = {{evgam}: An {R} Package for Generalized Additive Extreme
      Value Models},
    author = {Benjamin D. Youngman},
    journal = {Journal of Statistical Software},
    year = {2022},
    volume = {103},
    number = {3},
    pages = {1--26},
    doi = {10.18637/jss.v103.i03},
  }