deletions | additions       diff --git a/bibliography/biblio.bib b/bibliography/biblio.bib  index a899432..9d9bd94 100644  --- a/bibliography/biblio.bib  +++ b/bibliography/biblio.bib 
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author = {Giuseppe Bertola},  title = {{Labor Turnover Costs and Average Labor Demand}},  }  @article{Einstein_1905,  doi = {10.1002/andp.19053221004},  url = {http://dx.doi.org/10.1002/andp.19053221004},  year = {1905},  publisher = {Wiley-Blackwell},  volume = {322},  number = {10},  pages = {891--921},  author = {A. Einstein},  title = {{Zur Elektrodynamik bewegter Körper}},  journal = {Ann. Phys.},  }