To cite package ‘FlexGAM’ in publications use:

Spiegel E (2020). FlexGAM: Generalized Additive Models with Flexible Response Functions. R package version 0.7.2, https://CRAN.R-project.org/package=FlexGAM.

Corresponding BibTeX entry:

  @Manual{,
    title = {FlexGAM: Generalized Additive Models with Flexible
      Response Functions},
    author = {Elmar Spiegel},
    year = {2020},
    note = {R package version 0.7.2},
    url = {https://CRAN.R-project.org/package=FlexGAM},
  }