@electronic{www.wetteronline.de,
   title       = {Regen Radarprognose}, 
   url         = {http://www.wetteronline.de/radarprognose.htm},
   biburl      = {https://puma.uni-kassel.de/url/665278e7b2e38f8d9c699f08766a9b77/jukempf},
   keywords    = {fahrrad radar regen vorhersage},
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@electronic{www.cs.cmu.edu,
   title       = {Cut Once - Thunderbird Extension}, 
   url         = {http://www.cs.cmu.edu/~vitor/cutonce/cutOnce.html},
   biburl      = {https://puma.uni-kassel.de/url/0dc3478934dba9c3186474ab65293d9b/hotho},
   keywords    = {dm empfänger extension ml thunderbird vorhersage},
   added-at    = {2008-04-03T11:21:48.000+0200},
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