references.bib

@Manual{knitr,
  title = {knitr: A general-purpose package for dynamic report generation in R},
  author = {Alastair Andrew and Alex Zvoleff and Brian Diggs and Cassio Pereira and Hadley Wickham and Heewon Jeon and Jeff Arnold and Jeremy Stephens and Jim Hester and Joe Cheng and Jonathan Keane and J.J. Allaire and Johan Toloe and Kohske Takahashi and Michel Kuhlmann and Nacho Caballero and Nick Salkowski and Noam Ross and Ramnath Vaidyanathan and Richard Cotton and Romain Francois and Sietse Brouwer and Simon de Bernard and Taiyun Wei and Thibaut Lamadon and Tom Torsney-Weir and Trevor Davis and Weicheng Zhu and Wush Wu and Yihui Xie},
  year = {2013},
  note = {R package version 1.5},
  url = {http://yihui.name/knitr/},
  numeral = {1},
}
@Manual{knitcitations,
  title = {knitcitations: Citations for knitr markdown files},
  author = {Carl Boettiger},
  year = {2014},
  note = {R package version 0.5-0},
  url = {http://CRAN.R-project.org/package=knitcitations},
  numeral = {1},
}
@Manual{devtools,
  title = {devtools: Tools to make developing R code easier},
  author = {Hadley Wickham and Winston Chang},
  year = {2014},
  note = {R package version 1.5},
  url = {http://CRAN.R-project.org/package=devtools},
  numeral = {1},
}
@Manual{gitbook,
  title = {Gitbook: Build beautiful interactive books using GitHub/Git and Markdown},
  author = {{Samy Pessé and Aaron O'Mullan}},
  year = {2014},
  url = {http://www.gitbook.io/},
  numeral = {1},
}