deletions | additions       diff --git a/bibliography/biblio.bib b/bibliography/biblio.bib  index 816b086..03dd440 100644  --- a/bibliography/biblio.bib  +++ b/bibliography/biblio.bib 
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year={1999},  organization={ACM}  }  @article{sumi1997computer,  title={Computer-aided thinking by mapping text-objects into metric spaces},  author={Sumi, Yasuyuki and Hori, Koichi and Ohsuga, Setsuo},  journal={Artificial Intelligence},  volume={91},  number={1},  pages={71--84},  year={1997},  publisher={Elsevier}  }  @article{xu2016exploring,  title={Exploring Big Data Analysis: Fundamental Scientific Problems},  author={Xu, Zongben and Shi, Yong},