@techreport{murrell-definitions-2020,
  title="Catching Up with R Graphics",
  author = {Paul Murrell},
  year={2020},
  note={version 1},
  institution={Department of Statistics, The University of Auckland},
  number={2020-04},
  url={https://stattech.blogs.auckland.ac.nz/2020/07/14/2020-04-catching-up-with-r-graphics/},
  doi={http://dx.doi.org/10.17608/k6.auckland.12649751}
}