deletions | additions       diff --git a/bibliography/references.bib b/bibliography/references.bib  index 33187e9..2f5b776 100644  --- a/bibliography/references.bib  +++ b/bibliography/references.bib 
...
organization = {R Foundation for Statistical Computing},  address = {Vienna, Austria},  year = {2015},  url = {{http://www.R-project.org/}}, {{http://R-project.org/}},  } 
...
year = {2015},  url = {{http://www.R-project.org/}},  }