Kindly cite the sweidnumbr R package as follows:

  Magnusson, Mans and Bulow, Erik (2024). sweidnumbr: R tools to handle
  of swedish identity numbers. R package version 1.5.0 URL:
  https://github.com/rOpenGov/sweidnumbr

A BibTeX entry for LaTeX users is

  @Misc{,
    title = {sweidnumbr: R tools to handle of swedish identity numbers.},
    author = {Mans Magnusson and Erik Bulow},
    url = {https://github.com/rOpenGov/sweidnumbr},
    year = {2024},
    note = {R package version 1.5.0},
  }