@Book{Formula:Chambers+Hastie:1992,
  editor	= {John M. Chambers and Trevor J. Hastie},
  title		= {Statistical Models in \proglang{S}},
  publisher	= {Chapman \& Hall},
  year		= {1992},
  address	= {London}
}

@Manual{Formula:Coelli+Henningsen:2010,
  title		= {\pkg{frontier}: Stochastic Frontier Analysis},
  author	= {Tim Coelli and Arne Henningsen},
  year		= {2010},
  note		= {\proglang{R}~package version~0.996-6},
  url		= {http://CRAN.R-project.org/package=frontier},
}

@Article{Formula:Cribari-Neto+Zeileis:2010,
  author	= {Francisco Cribari-Neto and Achim Zeileis},
  title		= {Beta Regression in \proglang{R}},
  journal	= {Journal of Statistical Software},
  year		= {2010},
  volume	= {34},
  number	= {2},
  pages		= {1--24},
  url		= {http://www.jstatsoft.org/v34/i02/}
}

@Manual{Formula:Croissant:2010,
  title		= {\pkg{mlogit}: Multinomial Logit Model},
  author	= {Yves Croissant},
  year		= {2010},
  note		= {\proglang{R}~package version~0.1-5},
  url		= {http://CRAN.R-project.org/package=mlogit}
}

@Article{Formula:Croissant+Millo:2008,
  author	= {Yves Croissant and Giovanni Millo},
  title		= {Panel Data Econometrics in \proglang{R}: The \pkg{plm} Package},
  journal	= {Journal of Statistical Software},
  year		= {2008},
  volume	= {27},
  number	= {2},
  pages		= {1--43},
  url		= {http://www.jstatsoft.org/v27/i02/}
}

@Article{Formula:Hothorn+Hornik+VanDeWiel: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},
}

@Article{Formula:Hothorn+Hornik+VanDeWiel:2008,
  author	= {Torsten Hothorn and Kurt Hornik and
		   Mark A. van de Wiel and Achim Zeileis},
  title		= {Implementing a Class of Permutation Tests: The \pkg{coin} Package},
  year		= {2008},
  volume	= {28},
  number	= {8},
  pages		= {1--23},
  journal	= {Journal of Statistical Software},
  url		= {http://www.jstatsoft.org/v28/i08/}
}

@Manual{Formula:Hothorn+Hornik+Zeileis:2009,
  title		= {\pkg{party}: A Laboratory for Recursive Partytioning},
  author	= {Torsten Hothorn and Kurt Hornik and Achim Zeileis},
  year		= {2009},
  note		= {\proglang{R}~package version 0.9-998},
  url		= {http://CRAN.R-project.org/package=party}
}

@Book{Formula:Kleiber+Zeileis:2008,
  title		= {Applied Econometrics with \proglang{R}},
  author	= {Christian Kleiber and Achim Zeileis},
  year		= {2008},
  publisher	= {Springer-Verlag},
  address	= {New York}
}

@Manual{Formula:R:2009,
  title		= {\proglang{R}: {A} Language and Environment for Statistical Computing},
  author	= {{\proglang{R} Development Core Team}},
  organization	= {\proglang{R} Foundation for Statistical Computing},
  address	= {Vienna, Austria},
  year		= {2009},
  note          = {{ISBN} 3-900051-07-0},
  url		= {http://www.R-project.org/}
}

@Article{Formula:Stasinopoulos+Rigby:2007,
  author	= {D. Mikis Stasinopoulos and Robert A. Rigby},
  title		= {Generalized Additive Models for Location Scale and Shape ({GAMLSS}) in \proglang{R}},
  journal	= {Journal of Statistical Software},
  year		= {2007},
  volume	= {23},
  number	= {7},
  pages		= {1--46},
  url		= {http://www.jstatsoft.org/v23/i07/}
}

@Manual{Formula:Therneau+Lumley:2009,
  title		= {\pkg{survival}: Survival Analysis Including Penalised Likelihood},
  author	= {Terry Therneau and Thomas Lumley},
  year		= {2009},
  note		= {\proglang{R}~package version~2.35-4},
  url		= {http://CRAN.R-project.org/package=survival}
}

@Article{Formula:Wilkinson+Rogers:1973,
  author	= {G. N. Wilkinson and C. E. Rogers},
  title		= {Symbolic Description of Factorial Models for Analysis of
		   Variance},
  journal	= {Applied Statistics},
  year		= {1973},
  volume	= {22},
  pages		= {392--399}
}

@Article{Formula:Zeileis+Croissant:2010,
  author	= {Achim Zeileis and Yves Croissant},
  title		= {Extended Model Formulas in \proglang{R}: Multiple Parts and Multiple Responses},
  journal	= {Journal of Statistical Software},
  year		= {2010},
  volume	= {34},
  number	= {1},
  pages		= {1--13},
  url		= {http://www.jstatsoft.org/v34/i01/}
}

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

@Article{Formula:Zeileis+Kleiber+Jackman:2008,
  author	= {Achim Zeileis and Christian Kleiber and Simon Jackman},
  title		= {Regression Models for Count Data in \proglang{R}},
  journal	= {Journal of Statistical Software},
  year		= {2008},
  volume	= {27},
  number	= {8},
  pages		= {1--25},
  url		= {http://www.jstatsoft.org/v27/i08/}
}

