To cite plusser in publications use:

Waldhauser C (2014). plusser: A Google+ Interface for R. KDSS K Data Science Solutions, Vienna, Austria. R package version 0.4-0, http://kdss.at/.

A lot of time and effort went into creating plusser, please cite it when using it for data retrieval.

Corresponding BibTeX entry:

  @Manual{,
    title = {plusser: A Google+ Interface for R},
    author = {Christoph Waldhauser},
    organization = {KDSS K Data Science Solutions},
    address = {Vienna, Austria},
    year = {2014},
    note = {R package version 0.4-0},
    url = {http://kdss.at/},
  }