To cite package ‘tcxr’ in publications use:

  Fister I (2025). _tcxr: Parse and Analyze TCX Files_. R package
  version 0.1.0, <https://github.com/firefly-cpp/tcxr>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {tcxr: Parse and Analyze TCX Files},
    author = {Iztok Jr. Fister},
    year = {2025},
    note = {R package version 0.1.0},
    url = {https://github.com/firefly-cpp/tcxr},
  }