@article{Hothorn+Hornik+vandeWiel+Zeileis:2006,
  author  = {Torsten Hothorn and Kurt Hornik and Mark A van de Wiel and Achim
             Zeileis},
  title   = {A {L}ego System for Conditional Inference},
  journal = {The American Statistician},
  year    = {2006},
  volume  = {60},
  number  = {3},
  pages   = {257--263},
  doi     = {10.1198/000313006X118430},
}

@article{Hothorn+Hornik+vandeWiel+Zeileis:2008,
  author  = {Torsten Hothorn and Kurt Hornik and Mark A van de Wiel and Achim
             Zeileis},
  title   = {Implementing a Class of Permutation Tests: The coin Package},
  journal = {Journal of Statistical Software},
  year    = {2008},
  volume  = {28},
  number  = {8},
  pages   = {1--23},
  doi     = {10.18637/jss.v028.i08},
}

@article{Strasser+Weber:1999,
  author  = {Helmut Strasser and Christian Weber},
  title   = {The Asymptotic Theory of Permutation Statistics},
  journal = {Mathematical Methods of Statistics},
  year    = {1999},
  volume  = {8},
  number  = {2},
  pages   = {220--250},
  note    = {Preprint available from \url{https://epub.wu.ac.at/102}}
}
