Kindly cite the sweidnumbr R package as follows:

(C) Mans Magnusson(2014). sweidnumbr: R tools to handle of swedish identity numbers. URL: http://github.com/MansMeg/sweidnumbr

Corresponding BibTeX entry:

  @Misc{,
    title = {sweidnumbr: R tools to handle of swedish identity
      numbers.},
    author = {Mans Magnusson},
    year = {2014},
  }