@electronic{blog.pietrosperoni.it,
   title       = {P. S. : » Tagclouds and cultural changes}, 
   url         = {http://blog.pietrosperoni.it/2005/05/28/tagclouds-and-cultural-changes/},
   biburl      = {https://puma.uni-kassel.de/url/be57c31c97eac525ff873a8070f0131a/hotho},
   keywords    = {tagcould del.icio.us tag analysis cloud},
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@electronic{tagora.ecs.soton.ac.uk,
   title       = {HTML export of semantic web store}, 
   url         = {http://tagora.ecs.soton.ac.uk/delicious/tag/windows//html},
   biburl      = {https://puma.uni-kassel.de/url/5edb7e5cda0f41654c42c3a307542d69/hotho},
   keywords    = {del.icio.us rdf semantic tag tagging web},
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