@electronic{blog.searchmetrics.com,
   title       = {SEO: Google Ranking Faktoren 2012 für Deutschland}, 
   url         = {http://blog.searchmetrics.com/de/2012/02/09/die-google-ranking-faktoren-2012-fur-deutschland/},
   biburl      = {https://puma.uni-kassel.de/url/2dd10fd0b88bc65dd4a23f6731ba5929/droessler},
   keywords    = {blog facebook google ranking social_network},
   added-at    = {2012-04-24T08:53:42.000+0200},
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@electronic{www.heise.de,
   title       = {heise online | Facebook & Co: 2 Klicks für mehr Datenschutz}, 
   url         = {http://www.heise.de/newsticker/meldung/Facebook-Co-2-Klicks-fuer-mehr-Datenschutz-1335091.html},
   biburl      = {https://puma.uni-kassel.de/url/64444a4fa04ce9af2206842e741b0002/droessler},
   keywords    = {datenschutz facebook like-button social_network},
   added-at    = {2012-04-03T11:07:08.000+0200},
   description = {Auf heise online gibt es ab sofort neue Buttons, mit denen man Artikel auf Facebook, Google+ und Twitter empfehlen kann. Doch ohne Zutun des Anwenders senden diese Buttons keine Daten an Dritte.},
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   intrahash   = {64444a4fa04ce9af2206842e741b0002}
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@electronic{www.spiegel.de,
   title       = {Neue Regeln für die Nutzer: Farce in Facebookistan - SPIEGEL ONLINE}, 
   url         = {http://www.spiegel.de/netzwelt/netzpolitik/0,1518,823015,00.html},
   biburl      = {https://puma.uni-kassel.de/url/aa307af9a9cd7e82edc77f8088b6cbb0/droessler},
   keywords    = {facebook internet social_network},
   added-at    = {2012-03-22T19:00:34.000+0100},
   description = {Facebook will sich neue Regeln zum Umgang mit Nutzerdaten geben - und tut so, als würden die Änderungen in einem transparenten Prozess in Zusammenarbeit mit den Mitgliedern abgestimmt. Tatsächlich erinnert das Verfahren an Pro-Forma-Mitbestimmung in autoritären Staaten.},
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@electronic{www.ics.uci.edu,
   title       = {Author-Topic Model}, 
   url         = {http://www.ics.uci.edu/~michal/KDD/ATM.htm},
   biburl      = {https://puma.uni-kassel.de/url/87f07f1b5595b35950fb780d72dff697/benz},
   keywords    = {author author_topic_model sna social_network topics},
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@electronic{joindiaspora.com,
   title       = {DIASPORA* ALPHA}, 
   url         = {https://joindiaspora.com/},
   biburl      = {https://puma.uni-kassel.de/url/674da28adbb3561ca5d982a8f0bafe01/benz},
   keywords    = {decentralized dezentral diaspora social_network},
   added-at    = {2011-03-25T23:23:06.000+0100},
   description = {Diaspora lässt dich deine Kontakte in Gruppen einordnen. Deine Fotos, Geschichten und Witze werden durch diese Aspekte nur mit den Menschen geteilt, für die sie gedacht sind – einzigartig bei Diaspora. },
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   intrahash   = {674da28adbb3561ca5d982a8f0bafe01}
}

@electronic{www.researchgate.net,
   title       = {Scientific Network | ResearchGATE}, 
   url         = {https://www.researchgate.net/},
   biburl      = {https://puma.uni-kassel.de/url/e1de8d67d6a1fbdc612e1bbc3ec0b0c6/benz},
   keywords    = {collaboration network researchgate scientific social_network},
   added-at    = {2011-02-04T16:08:01.000+0100},
   description = {ResearchGATE is a scientific network that connects researchers. Find research partners, collaborate with scientists and explore journal articles.},
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@electronic{www.suite101.de,
   title       = {Suite101: Das Netzwerk der Autoren.}, 
   url         = {http://www.suite101.de/},
   biburl      = {https://puma.uni-kassel.de/url/46c0a13dc124e5eafc5d624dad383a1f/benz},
   keywords    = {authors autoren free network netzwerk online social_network suite101},
   added-at    = {2011-02-04T16:07:42.000+0100},
   description = {Online-Magazin und Netzwerk freier Autoren und Journalisten.},
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   intrahash   = {46c0a13dc124e5eafc5d624dad383a1f}
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@electronic{socialnetworks.mpi-sws.org,
   title       = {Online Social Networks Research @MPI-SWS}, 
   url         = {http://socialnetworks.mpi-sws.org/},
   biburl      = {https://puma.uni-kassel.de/url/bd1d323860ba4faafd18250421c1dc94/benz},
   keywords    = {dataset download misvlove social_network},
   added-at    = {2011-02-04T16:07:28.000+0100},
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   intrahash   = {bd1d323860ba4faafd18250421c1dc94}
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@electronic{www.angela-bohn.de,
   title       = {Social Network Data}, 
   url         = {http://www.angela-bohn.de/data.html},
   biburl      = {https://puma.uni-kassel.de/url/f12e6a09d67816c3b8cdfcc628488675/benz},
   keywords    = {data dataset sna social_network},
   added-at    = {2011-02-04T16:07:16.000+0100},
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