diff --git a/ref.bib b/ref.bib
index cb9b12a120873979b227c8eed6751a46dc9db2ec..baf47dfa8e734a1d80ceca2babe12946307de2fc 100644
--- a/ref.bib
+++ b/ref.bib
@@ -30,3 +30,48 @@
   author={Kille, Benjamin and Lommatzsch, Andreas and Turrin, Roberto and Ser{\'e}ny, Andr{\'a}s and Larson, Martha and Brodt, Torben and Seiler, Jonas and Hopfgartner, Frank},
   year={2015}
 }
+
+@inproceedings{gabrilovich2004newsjunkie,
+  title={Newsjunkie: providing personalized newsfeeds via analysis of information novelty},
+  author={Gabrilovich, Evgeniy and Dumais, Susan and Horvitz, Eric},
+  booktitle={Proceedings of the 13th international conference on World Wide Web},
+  pages={482--490},
+  year={2004},
+  organization={ACM}
+}
+
+@inproceedings{jancsary2010towards,
+  title={Towards context-aware personalization and a broad perspective on the semantics of news articles},
+  author={Jancsary, Jeremy and Neubarth, Friedrich and Trost, Harald},
+  booktitle={Proceedings of the fourth ACM conference on Recommender systems},
+  pages={289--292},
+  year={2010},
+  organization={ACM}
+}
+
+@inproceedings{li2011scene,
+  title={Scene: a scalable two-stage personalized news recommendation system},
+  author={Li, Lei and Wang, Dingding and Li, Tao and Knox, Daniel and Padmanabhan, Balaji},
+  booktitle={Proceedings of the 34th international ACM SIGIR conference on Research and development in Information Retrieval},
+  pages={125--134},
+  year={2011},
+  organization={ACM}
+}
+
+@inproceedings{kulkarni2013all,
+  title={All the news that's fit to read: a study of social annotations for news reading},
+  author={Kulkarni, Chinmay and Chi, Ed},
+  booktitle={Proceedings of the SIGCHI Conference on Human Factors in Computing Systems},
+  pages={2407--2416},
+  year={2013},
+  organization={ACM}
+}
+
+@inproceedings{gebremeskel2015role,
+  title={The Role of Geographic Information in News Consumption},
+  author={Gebremeskel, Gebrekirstos G and de Vries, Arjen P},
+  booktitle={Proceedings of the 24th International Conference on World Wide Web Companion},
+  pages={755--760},
+  year={2015}
+ 
+}