====== Bibliography ======

  * Wickham, Grolemund: [[http://r4ds.had.co.nz/|R for Data Science]]
  * Hadley Wickham: [[http://r-pkgs.had.co.nz/|R-packages]].
  * Benjamin S. Baumer, Daniel T. Kaplan, Nicholas J. Horton: Modern Data Science with R
  * Thomas Mailund: Functional Data Structures in R. Apress, 2017
  * Julia Silge and David Robinson: [[https://www.tidytextmining.com/|Text Mining with R; A Tidy Approach]]
  * Max Kuhn and Kjell Johnson: Applied Predictive Modeling.  2013
  * Nicholas J. Horton and Ken Kleinman: Using R and RStudio for Data Management, Statistical Analysis, and Graphics.
  * Wes McKinney: Python for Data Analysis: Data Wrangling with Pandas, NumPy, and IPython
  * Roger D. Peng, Sean Kross, and Brooke Anderson: Mastering Software Development in R. [[https://bookdown.org/rdpeng/RProgDA/|bookdown]]
  * [[https://bookdown.org/|bookdown]] ; https://bookdown.org/rdpeng/RProgDA/
  * https://www.datasciencecentral.com/m/blogpost?id=6448529:BlogPost:444828
  * http://www.listendata.com/2016/08/dplyr-tutorial.html
  * Bruno Rodrigues: [[https://b-rodrigues.github.io/fput/|Functional programming and unit testing for data munging with R]].