If ctree() is used additionally cite: If mob() is used additionally
cite:

  Hothorn T, Zeileis A (2015). “partykit: A Modular Toolkit for
  Recursive Partytioning in R.” _Journal of Machine Learning Research_,
  *16*, 3905-3909. <https://jmlr.org/papers/v16/hothorn15a.html>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {{partykit}: A Modular Toolkit for Recursive Partytioning in {R}},
    author = {Torsten Hothorn and Achim Zeileis},
    journal = {Journal of Machine Learning Research},
    year = {2015},
    volume = {16},
    pages = {3905-3909},
    url = {https://jmlr.org/papers/v16/hothorn15a.html},
  }

  Hothorn T, Hornik K, Zeileis A (2006). “Unbiased Recursive
  Partitioning: A Conditional Inference Framework.” _Journal of
  Computational and Graphical Statistics_, *15*(3), 651-674.
  doi:10.1198/106186006X133933
  <https://doi.org/10.1198/106186006X133933>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Unbiased Recursive Partitioning: A Conditional Inference Framework},
    author = {Torsten Hothorn and Kurt Hornik and Achim Zeileis},
    journal = {Journal of Computational and Graphical Statistics},
    year = {2006},
    volume = {15},
    number = {3},
    doi = {10.1198/106186006X133933},
    pages = {651--674},
  }

  Zeileis A, Hothorn T, Hornik K (2008). “Model-Based Recursive
  Partitioning.” _Journal of Computational and Graphical Statistics_,
  *17*(2), 492-514. doi:10.1198/106186008X319331
  <https://doi.org/10.1198/106186008X319331>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Model-Based Recursive Partitioning},
    author = {Achim Zeileis and Torsten Hothorn and Kurt Hornik},
    journal = {Journal of Computational and Graphical Statistics},
    year = {2008},
    volume = {17},
    number = {2},
    doi = {10.1198/106186008X319331},
    pages = {492--514},
  }