@article{Hothorn2006,
author = {Hothorn, T. and Hornik, K. and Zeileis, A. },
title= {Unbiased recursive partitioning: A conditional inference framework},
year = {2006},
doi = {10.1198/106186006X133933},
journal = {Journal of Computational and Graphical Statistics},
volume = {15},
number = {3},
pages = {651--674},
}