@electronic{www.kde.cs.uni-kassel.de,
   title       = {2nd International Workshop on Mining Ubiquitous and Social Environments - @ ECML/PKDD 2011}, 
   url         = {http://www.kde.cs.uni-kassel.de/ws/muse2011/},
   biburl      = {https://puma.uni-kassel.de/url/ac1075e0a6219d6ec0e7dd5ba0c65d00/hotho},
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@electronic{www.dcs.warwick.ac.uk,
   title       = {3rd Workshop on Recommender Systems and the Social Web}, 
   url         = {http://www.dcs.warwick.ac.uk/~ssanand/RSWeb11/index.htm},
   biburl      = {https://puma.uni-kassel.de/url/a5cc853472ad805d0cbb0f755cf245f7/hotho},
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