deletions | additions       diff --git a/bibliography/biblio.bib b/bibliography/biblio.bib  index b96a904..85f0be5 100644  --- a/bibliography/biblio.bib  +++ b/bibliography/biblio.bib 
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@article{Wittenberg_1994,  doi = {10.1108/eum0000000004213},  url = {http://dx.doi.org/10.1108/eum0000000004213}, {http://dx.doi.org/10.1108/EUM0000000004213},  year = {1994},  month = {dec},  publisher = {Emerald},