To cite package ‘rusk’ in publications use:

Guyader V (2018). rusk: Beautiful Graphical Representation of Multiplication Tables on a Modular Circle. R package version 0.1.1, https://github.com/thinkr-open/rusk.

Corresponding BibTeX entry:

  @Manual{,
    title = {rusk: Beautiful Graphical Representation of Multiplication
      Tables on a Modular Circle},
    author = {Vincent Guyader},
    year = {2018},
    note = {R package version 0.1.1},
    url = {https://github.com/thinkr-open/rusk},
  }