To cite 'quadrupen' in publications, please use:

Chiquet J (2026). Quadrupen: Sparse and Group Sparse Linear Models. https://github.com/jchiquet/quadrupen.

Grandvalet Y, Chiquet J, Ambroise C (2012). “Sparsity by Worst-Case Quadratic Penalties.” arXiv preprint. https://arxiv.org/abs/1210.2077.

Corresponding BibTeX entries:

  @Manual{,
    author = {Julien Chiquet},
    title = {Quadrupen: Sparse and Group Sparse Linear Models},
    year = {2026},
    url = {https://github.com/jchiquet/quadrupen},
  }

  @Article{quadrupen,
    title = {Sparsity by Worst-Case Quadratic Penalties},
    author = {Yves Grandvalet and Julien Chiquet and Christophe
      Ambroise},
    journal = {arXiv preprint},
    year = {2012},
    url = {https://arxiv.org/abs/1210.2077},
  }