To cite package ‘robustX’ in publications use:

  Maechler M, Stahel W (2023). _robustX: 'eXtra' / 'eXperimental'
  Functionality for Robust Statistics_. R package version 1.2-7,
  <https://CRAN.R-project.org/package=robustX>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {robustX: 'eXtra' / 'eXperimental' Functionality for Robust Statistics},
    author = {Martin Maechler and Werner A. Stahel},
    year = {2023},
    note = {R package version 1.2-7},
    url = {https://CRAN.R-project.org/package=robustX},
  }