@electronic{www.spiegel.de,
   title       = {SPIEGEL ONLINE}, 
   url         = {http://www.spiegel.de/},
   biburl      = {https://puma.uni-kassel.de/url/246ee772548c0b40ee205f075fb7c9cc/hotho},
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@electronic{news.google.de,
   title       = {Google News Deutschland}, 
   url         = {http://news.google.de/},
   biburl      = {https://puma.uni-kassel.de/url/ad17f324f4053203ba22708bee892eef/hotho},
   keywords    = {google news deutsch german summarization},
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