deletions | additions       diff --git a/bibliography/biblio.bib b/bibliography/biblio.bib  index 1849356..0867ad2 100644  --- a/bibliography/biblio.bib  +++ b/bibliography/biblio.bib 
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year = {2004},  pages = {407–417},  }  @article{Li_2011,  title = {{XML Document Clustering Based on Spectral Analysis Method}},  volume = {219-220},  issn = {1662-8985},  url = {http://dx.doi.org/10.4028/www.scientific.net/amr.219-220.304},  doi = {10.4028/www.scientific.net/amr.219-220.304},  journal = {Advanced Materials Research},  publisher = {Trans Tech Publications},  author = {Li, Xin Ye},  year = {2011},  month = {May},  pages = {304–307},  }