@article{JMLR:v16:hothorn15a,
  author  = {Torsten Hothorn and Achim Zeileis},
  title   = {partykit: A Modular Toolkit for Recursive Partytioning in R},
  journal = {Journal of Machine Learning Research},
  year    = {2015},
  volume  = {16},
  number  = {118},
  pages   = {3905--3909},
  url     = {http://jmlr.org/papers/v16/hothorn15a.html}
}