deletions | additions       diff --git a/bibliography/biblio.bib b/bibliography/biblio.bib  index 39676bb..cfe7329 100644  --- a/bibliography/biblio.bib  +++ b/bibliography/biblio.bib 
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title = {{{STOPPING} {OF} {IONS} {HEAVIER} {THAN} {HELIUM}: {CONTENTS}}},  journal = {Journal of the {ICRU}},  }  @article{Copper_Stop,  doi = {http://www.srim.org/SRIM/SRIMPICS/STOP01/STOP0129.gif},  url = {http://www.srim.org/SRIM/SRIMPICS/STOP01/STOP0129.gif},  title = {http://www.srim.org/SRIM/SRIMPICS/STOP01/STOP0129.gif},  }