@electronic{moz.com,
   title       = {Google Algorithm Change History - Moz}, 
   url         = {http://moz.com/google-algorithm-change},
   biburl      = {https://puma.uni-kassel.de/url/0c6e15e5df8ce314b550986bdc034853/stumme},
   keywords    = {Google IR algorithm pagerank},
   added-at    = {2014-05-16T11:05:09.000+0200},
   description = {},
   interhash   = {0c6e15e5df8ce314b550986bdc034853}, 
   intrahash   = {0c6e15e5df8ce314b550986bdc034853}
}

@electronic{www-i1.informatik.rwth-aachen.de,
   title       = {Algorithmus der Woche - Informatikjahr 2006}, 
   url         = {http://www-i1.informatik.rwth-aachen.de/~algorithmus/},
   biburl      = {https://puma.uni-kassel.de/url/76047a6657333dafbc00cc91805e48f7/stumme},
   keywords    = {AlgoDS algorithm algorithmus der informatikjahr woche},
   added-at    = {2009-09-21T16:57:48.000+0200},
   description = {},
   interhash   = {76047a6657333dafbc00cc91805e48f7}, 
   intrahash   = {76047a6657333dafbc00cc91805e48f7}
}