@electronic{www.alexa.com,
   title       = {Alexa Web Search}, 
   url         = {http://www.alexa.com/},
   biburl      = {https://puma.uni-kassel.de/url/f1a9caec802f73d3d7b6143990ea1a81/hotho},
   keywords    = {search web alexa engine suchmaschinen},
   added-at    = {2006-03-23T20:52:08.000+0100},
   description = {},
   interhash   = {f1a9caec802f73d3d7b6143990ea1a81}, 
   intrahash   = {f1a9caec802f73d3d7b6143990ea1a81}
}