To cite ridgetorus in publications use:

García-Portugués E, Prieto-Tirado A (2023). ridgetorus: PCA on the Torus via Density Ridges. R package version 1.0.1, https://github.com/egarpor/ridgetorus.

Corresponding BibTeX entry:

  @Manual{,
    title = {{ridgetorus}: {PCA} on the Torus via Density Ridges},
    author = {Eduardo García-Portugués and Arturo Prieto-Tirado},
    year = {2023},
    note = {R package version 1.0.1},
    url = {https://github.com/egarpor/ridgetorus},
  }