To cite abclass in publications use:

  Wang W (2022). _abclass: Angle-Based Large-Margin Classifiers_. R
  package version 0.4.0, <https://CRAN.R-project.org/package=abclass>.

A BibTeX entry for LaTeX users is

  @Manual{abclass-package,
    title = {{abclass}: {A}ngle-Based Large-Margin Classifiers},
    author = {Wenjie Wang},
    year = {2022},
    url = {https://CRAN.R-project.org/package=abclass},
    note = {{R} package version 0.4.0},
  }