deletions | additions       diff --git a/bibliography/biblio.bib b/bibliography/biblio.bib  index c54e0fa..e70c871 100644  --- a/bibliography/biblio.bib  +++ b/bibliography/biblio.bib 
...
title = {{{MathJax}: A Platform for Mathematics on the Web}},  journal = {Notices Amer. Math. Soc.},  }  @incollection{Venema_2009,  doi = {10.5948/9781614441113.003},  url = {http://dx.doi.org/10.5948/9781614441113.003},  year = {2009},  publisher = {The Mathematical Association of America},  pages = {13--22},  author = {Gerard A. Venema},  title = {{The Elements of {GeoGebra}}},  booktitle = {Exploring Advanced Euclidean Geometry with {GeoGebra}},  }