deletions | additions       diff --git a/bibliography/biblio.bib b/bibliography/biblio.bib  index 0565344..ace9583 100644  --- a/bibliography/biblio.bib  +++ b/bibliography/biblio.bib 
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urldate = {2015-03-31},  }  @article{Thelwall_2013,  url = {http://cybermetrics.cindoc.csic.es/articles/v17i1p1.html},  year = {2013}, 
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}  @article{Thelwall_2013_b,  url = {http://cybermetrics.cindoc.csic.es/articles/v17i1p1.html},  year = {2013},  publisher = {Centro de Informacion y Documentaci{\'o}n Cient{\'\i}fica (CINDOC)},  volume = {17},  number = {1},  author = {Thelwall, Mike and Tsou, Andrew and Weingart, Scott and Holmberg, Kim and Haustein, Stefanie},  title = {{Tweeting Links to Academic Articles}},  journal = {Cybermetrics: International Journal of Scientometrics, Informetrics and Bibliometrics},  }  @article{Thelwall_2013_a,  url = {http://cybermetrics.cindoc.csic.es/articles/v17i1p1.html},  title={Tweeting links to academic articles},  author={Thelwall, Mike and Tsou, Andrew and Weingart, Scott and Holmberg, Kim and Haustein, Stefanie},