To cite package ‘PPtreeExt’ in publications use:

da Silva N, Cook D, Lee E (2026). PPtreeExt: Projection Pursuit Classification Tree Extensions. R package version 0.1.0, https://CRAN.R-project.org/package=PPtreeExt.

Corresponding BibTeX entry:

  @Manual{,
    title = {PPtreeExt: Projection Pursuit Classification Tree
      Extensions},
    author = {Natalia {da Silva} and Dianne Cook and Eun-Kyung Lee},
    year = {2026},
    note = {R package version 0.1.0},
    url = {https://CRAN.R-project.org/package=PPtreeExt},
  }