deletions | additions       diff --git a/bibliography/biblio.bib b/bibliography/biblio.bib  index 3a33dec..ccd91eb 100644  --- a/bibliography/biblio.bib  +++ b/bibliography/biblio.bib 
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@article{Copper_Stop,  doi = {http://www.srim.org/SRIM/SRIMPICS/STOP01/STOP0129.gif},  url = {http://www.srim.org/SRIM/SRIMPICS/STOP01/STOP0129.gif},  author = {J. F. Ziegler;},  title = {{http://www.srim.org/SRIM/SRIMPICS/STOP01/STOP0129.gif}},  }