To cite package ‘recmap’ in publications use:

  Panse C (2018). “Rectangular Statistical Cartograms in R: The recmap
  Package.” _Journal of Statistical Software, Code Snippets_, *86*(1),
  1-27. doi:10.18637/jss.v086.c01
  <https://doi.org/10.18637/jss.v086.c01>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Rectangular Statistical Cartograms in {R}: The {recmap} Package},
    author = {Christian Panse},
    journal = {Journal of Statistical Software, Code Snippets},
    year = {2018},
    volume = {86},
    number = {1},
    pages = {1--27},
    doi = {10.18637/jss.v086.c01},
  }

  Heilmann R, Keim D, Panse C, Sips M (2004). “RecMap: Rectangular Map
  Approximations.” In _10th IEEE Symposium on Information Visualization
  (InfoVis 2004), 10-12 October 2004, Austin, TX, USA_, 33-40.
  doi:10.1109/INFVIS.2004.57 <https://doi.org/10.1109/INFVIS.2004.57>.

A BibTeX entry for LaTeX users is

  @InProceedings{,
    title = {RecMap: Rectangular Map Approximations},
    author = {Roland Heilmann and Daniel Keim and Christian Panse and Mike Sips},
    booktitle = {10th {IEEE} Symposium on Information Visualization (InfoVis 2004), 10-12 October 2004, Austin, TX, {USA}},
    pages = {33-40},
    month = {October},
    year = {2004},
    doi = {10.1109/INFVIS.2004.57},
  }