@electronic{www.phys.uniroma1.it,
   title       = {Dip. Fisica - Univ. "La Sapienza" - Roma}, 
   url         = {http://www.phys.uniroma1.it/DipWeb/home.html},
   biburl      = {https://puma.uni-kassel.de/url/50c0f72e165e79dc360e1c4eea3b9000/benz},
   keywords    = {department location map physics university_rome},
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@electronic{zonetag.research.yahoo.com,
   title       = {ZoneTag Photos}, 
   url         = {http://zonetag.research.yahoo.com/},
   biburl      = {https://puma.uni-kassel.de/url/e09220d1fe2cc1fe727b6041fb530289/benz},
   keywords    = {auto-tagging flickr geo location photos pictures recommender tag_recommender tagging upload zonetag},
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