@electronic{datasys.cs.iit.edu,
   title       = {DataSys: Projects}, 
   url         = {http://datasys.cs.iit.edu/projects/CiteSearcher/details.html},
   biburl      = {https://puma.uni-kassel.de/url/04b6a7d213ddc2c0e036c70a30d04b12/hotho},
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@electronic{www2007.org,
   title       = {WWW2007 Paper Details}, 
   url         = {http://www2007.org/program/paper.php?id=286},
   biburl      = {https://puma.uni-kassel.de/url/abdcbc175cec42258b85adebc1474301/hotho},
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@electronic{www.heise.de,
   title       = {heise online - Suchmaschine zum Mitmachen}, 
   url         = {http://www.heise.de/newsticker/meldung/82948},
   biburl      = {https://puma.uni-kassel.de/url/464b24324eeb4f6d900d190a354c55ac/hotho},
   keywords    = {search engine suchmaschine wikipedia community ranking},
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@electronic{collabrank.web.cse.unsw.edu.au,
   title       = {CollaborativeRank -- del.icio.us search engine}, 
   url         = {http://collabrank.web.cse.unsw.edu.au/del.icio.us/},
   biburl      = {https://puma.uni-kassel.de/url/96f696639c7cbd4b11c8c272c89153ed/hotho},
   keywords    = {search folksonomy collaborative tools del.icio.us seminar2006 ranking},
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@electronic{www.rawsugar.com,
   title       = {RawSugar}, 
   url         = {http://www.rawsugar.com/index.faces},
   biburl      = {https://puma.uni-kassel.de/url/f9b945a8113299df90187d48ea06b96e/hotho},
   keywords    = {search suchmaschinen folksonomy del.icio.us clone tagrank ranking},
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   description = {RawSugar is a social search engine powered by user contributions. We're an online community, with over 170,000 URLs already tagged by our members.

Save and organize your favorite webpages along with your notes to share with your friends and community. Publish your directory with RawSugar patented guided search and earn $$. Learn More},
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@electronic{torrez.us,
   title       = {Elias Torres » TagRank}, 
   url         = {http://torrez.us/archives/2005/07/13/364},
   biburl      = {https://puma.uni-kassel.de/url/b9142cc965f8d5f618eb67f31b851cd0/hotho},
   keywords    = {ranking search tagrank},
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   description = {Ranking Bookmarks and Bistros:
Intelligent Community and Folksonomy Development},
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@electronic{www.gorank.com,
   title       = {goRank SEO Tools - Ontology Related Keyword Finder}, 
   url         = {http://www.gorank.com/seotools/ontology/index.php?},
   biburl      = {https://puma.uni-kassel.de/url/89b23812c69176cf6782a17b9dbf000a/hotho},
   keywords    = {search keyword word seo ranking},
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