deletions | additions       diff --git a/bibliography/biblio.bib b/bibliography/biblio.bib  index d91e402..98da776 100644  --- a/bibliography/biblio.bib  +++ b/bibliography/biblio.bib 
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@misc{Ziegler_2011_PIC,  author = {James F. Ziegler and M.D. Ziegler and J.P. Biersack},  title = {{Hydrogen in Copper}},  howpublished = {{{{{{{{{{{{{{{{{{{{http://www.srim.org/SRIM/SRIMPICS/STOP01/STOP0129.gif}}}}}}}}}}}}}}}}}}}}}, {{{{{{{{{{{{{{{{{{{{{http://www.srim.org/SRIM/SRIMPICS/STOP01/STOP0129.gif}}}}}}}}}}}}}}}}}}}}}},  year = {2011},  note = {[Online; accessed 21-Aug-2015]},  } 
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title = {{Sputtering of Metal Surfaces by Ion Bombardment}},  booktitle = {Atomic and Ionic Impact Phenomena on Metal Surfaces},  }  @article{Lehmann_1978,  doi = {10.1063/1.2994975},  url = {http://dx.doi.org/10.1063/1.2994975},  year = {1978},  publisher = {{AIP} Publishing},  volume = {31},  number = {3},  pages = {70},  author = {C. Lehmann and Donald G. Doran},  title = {{Interaction of Radiation with Solids an Elementary Defect Production}},  journal = {Phys. Today},  }