deletions | additions       diff --git a/bibliography/main.bib b/bibliography/main.bib  index d341ee9..0af0176 100644  --- a/bibliography/main.bib  +++ b/bibliography/main.bib 
...
}  @article{Fern_ndez_Su_rez_2008, @article{Fernandez_2008,  doi = {10.1038/nrm2531},  url = {http://dx.doi.org/10.1038/nrm2531},  year = {2008},