To cite package 'rdnb' in publications use:

Graul, Christian (2016): rdnb: R interface to the Deutsche Nationalbibliohek (German National Library) API. R package version 0.1-1, https://cran.r-project.org/package=rdnb.

Please cite both 'rdnb' and R when using 'rdnb'. For R citation, see ‘citation()’

Corresponding BibTeX entry:

  @Manual{,
    title = {rdnb: R interface to the Deutsche Nationalbibliohek
      (German National Library) API},
    author = {Christian Graul},
    year = {2016},
    url = {https://cran.r-project.org/package=rdnb},
    note = {R package version 0.1-1},
  }