To cite stablelearner/stabletree in publications use:

Philipp M, Zeileis A, Strobl C (2016). “A Toolkit for Stability Assessment of Tree-Based Learners.” In Colubi A, Blanco A, Gatu C (eds.), Proceedings of COMPSTAT 2016 – 22nd International Conference on Computational Statistics, 315–325. ISBN 978-90-73592-36-0, Preprint available at http://EconPapers.RePEc.org/RePEc:inn:wpaper:2016-11.

Philipp M, Rusch T, Hornik K, Strobl C (2018). “Measuring the Stability of Results from Supervised Statistical Learning.” Journal of Computational and Graphical Statistics, 27(4), 685–700. doi: 10.1080/10618600.2018.1473779.

Corresponding BibTeX entries:

  @InProceedings{,
    title = {A Toolkit for Stability Assessment of Tree-Based
      Learners},
    author = {Michel Philipp and Achim Zeileis and Carolin Strobl},
    year = {2016},
    booktitle = {Proceedings of {COMPSTAT} 2016 -- 22nd International
      Conference on Computational Statistics},
    editor = {Ana Colubi and Angela Blanco and Cristian Gatu},
    isbn = {978-90-73592-36-0},
    publisher = {The International Statistical Institute/International
      Association for Statistical Computing},
    pages = {315--325},
    note = {Preprint available at
      \url{http://EconPapers.RePEc.org/RePEc:inn:wpaper:2016-11}},
  }

  @Article{,
    title = {Measuring the Stability of Results from Supervised
      Statistical Learning},
    author = {Michel Philipp and Thomas Rusch and Kurt Hornik and
      Carolin Strobl},
    journal = {Journal of Computational and Graphical Statistics},
    volume = {27},
    number = {4},
    pages = {685--700},
    year = {2018},
    doi = {10.1080/10618600.2018.1473779},
  }