deletions | additions       diff --git a/bibliography/biblio.bib b/bibliography/biblio.bib  index 5f8cdfb..5114132 100644  --- a/bibliography/biblio.bib  +++ b/bibliography/biblio.bib 
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pages = {e33540},  pubmed_id = {22457774},  }  @article{21494658,  title = {{Multilevel compression of random walks on networks reveals hierarchical organization in large integrated systems.}},  date = {2011 Apr 8},  source = {PLoS One},  authors = {Rosvall, M and Bergstrom, CT},  author = {Rosvall, M and Bergstrom, CT},  year = {2011},  month = {Apr},  journal = {PLoS One},  volume = {6},  number = {},  pages = {e18209},  pubmed_id = {21494658},  }