To cite c3dr in publications use:

  Nolte, S., (2026). c3dr: An R Package to Read and Write C3D Motion
  Capture Files. Journal of Open Source Software, 11(118), 9951,
  https://doi.org/10.21105/joss.09951

A BibTeX entry for LaTeX users is

  @Article{,
    title = {c3dr: An R Package to Read and Write C3D Motion Capture Files},
    author = {Simon Nolte},
    year = {2026},
    url = {https://doi.org/10.21105/joss.09951},
    doi = {10.21105/joss.09951},
    journal = {Journal of Open Source Software},
    publisher = {The Open Journal},
    volume = {111},
    number = {118},
    pages = {9951},
  }