To cite nettskjemar in publications use:

  Athanasia Monika Mowinckel. (2021, May 10). LCBC-UiO/nettskjemar:
  v0.1.04 (Version v0.1.04). Zenodo.
  http://doi.org/10.5281/zenodo.4745481

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {nettskjemar - Package to work with University of Oslo Nettskjema API},
    author = {Athanasia Mo Mowinckel},
    year = {2021},
    month = {05},
    day = {10},
    doi = {10.5281/zenodo.4745481},
  }