deletions | additions       diff --git a/bibliography/biblio.bib b/bibliography/biblio.bib  index 21c7a29..8afd203 100644  --- a/bibliography/biblio.bib  +++ b/bibliography/biblio.bib 
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title = {{The Origins and Early Development of Mediterranean Maritime Activity}},  journal = {Journal of Mediterranean Archaeology},  }  @article{Penkman_2011,  doi = {10.1038/nature10305},  url = {http://dx.doi.org/10.1038/nature10305},  year = {2011},  month = {jul},  publisher = {Nature Publishing Group},  volume = {476},  number = {7361},  pages = {446--449},  author = {Kirsty E. H. Penkman and Richard C. Preece and David R. Bridgland and David H. Keen and Tom Meijer and Simon A. Parfitt and Tom S. White and Matthew J. Collins},  title = {{A chronological framework for the British Quaternary based on Bithynia opercula}},  journal = {Nature},  }