deletions | additions       diff --git a/bibliography/biblio.bib b/bibliography/biblio.bib  index e0f1fac..484c58a 100644  --- a/bibliography/biblio.bib  +++ b/bibliography/biblio.bib 
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title = {{Generalized Gradient Approximation Made Simple}},  journal = {Phys. Rev. Lett.},  }  @article{Bethe_1930,  year = {1930},  volume = {5},  number = {324},  author = {H. Bethe},  journal = {Ann. Phys. (Leipzig) Lett.},  }