@electronic{googleonlinesecurity.blogspot.de,
   title       = {Google Online Security Blog: Street View and reCAPTCHA technology just got smarter}, 
   url         = {http://googleonlinesecurity.blogspot.de/2014/04/street-view-and-recaptcha-technology.html},
   biburl      = {https://puma.uni-kassel.de/url/77d45b9682ef371ea7be0c407be49956/stumme},
   keywords    = {google map maps recaptcha street streetview view},
   added-at    = {2014-04-22T12:01:40.000+0200},
   description = {},
   interhash   = {77d45b9682ef371ea7be0c407be49956}, 
   intrahash   = {77d45b9682ef371ea7be0c407be49956}
}

@electronic{sautter.com,
   title       = {transparent map comparison openstreetmap google yahoo}, 
   url         = {http://sautter.com/map/},
   biburl      = {https://puma.uni-kassel.de/url/6d8531334267794c89b35f5c496f749e/stumme},
   keywords    = {comparison everyaware google maps openstreetmap osm vergleich},
   added-at    = {2009-09-04T11:10:25.000+0200},
   description = {},
   interhash   = {6d8531334267794c89b35f5c496f749e}, 
   intrahash   = {6d8531334267794c89b35f5c496f749e}
}