@electronic{wiki.ontoworld.org,
   title       = {Semantic Web Topic Hierarchy - Ontoworld.org}, 
   url         = {http://wiki.ontoworld.org:80/index.php/Semantic_Web_Topic_Hierarchy},
   biburl      = {https://puma.uni-kassel.de/url/1ef705eb1e8a667f59d0cf1bbe4e2141/hotho},
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@electronic{www.fuzzzy.com,
   title       = {Fuzzzy - Home}, 
   url         = {http://www.fuzzzy.com/},
   biburl      = {https://puma.uni-kassel.de/url/d4568e07fb6307bf01e9551407c506ef/hotho},
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@electronic{ontoworld.org,
   title       = {Semantic Web Topic Hierarchy - Ontoworld.org}, 
   url         = {http://ontoworld.org/wiki/Semantic_Web_Topic_Hierarchy},
   biburl      = {https://puma.uni-kassel.de/url/218e2c885bfedbdfc59aa9f6b3562397/hotho},
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@electronic{mstrohm.wordpress.com,
   title       = {Why do users tag? Detecting user motivation in tagging systems « Intentialicious}, 
   url         = {http://mstrohm.wordpress.com/2009/04/05/why-do-users-tag-detecting-user-motivation-in-tagging-systems/},
   biburl      = {https://puma.uni-kassel.de/url/cdade0f17541e0b0beeece7d1c902efc/hotho},
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@electronic{people.cs.umass.edu,
   title       = {Evaluation Methods for Topic Models - evaluation.pdf}, 
   url         = {http://people.cs.umass.edu/~wallach/talks/evaluation.pdf},
   biburl      = {https://puma.uni-kassel.de/url/569e1dd595f5199aa8604fb4e141416b/hotho},
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@electronic{www.scottbot.net,
   title       = {Topic Modeling for Humanists: A Guided Tour – the scottbot irregular}, 
   url         = {http://www.scottbot.net/HIAL/?p=19113},
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