@electronic{swivel.com,
   title       = {Swivel - Home}, 
   url         = {http://swivel.com/},
   biburl      = {https://puma.uni-kassel.de/url/a6766e43f85ebae5fc557031e221829d/hotho},
   keywords    = {exploration data dm kdd ****},
   added-at    = {2006-12-19T12:49:50.000+0100},
   description = {},
   interhash   = {a6766e43f85ebae5fc557031e221829d}, 
   intrahash   = {a6766e43f85ebae5fc557031e221829d}
}

@electronic{denkstelle.com,
   title       = {Schnelldenkspiel}, 
   url         = {http://denkstelle.com/schnelldenkspiel/index.html},
   biburl      = {https://puma.uni-kassel.de/url/4572e706f2f1288bc170d149aa09d6c5/hotho},
   keywords    = {reverse game spiel **** tetris},
   added-at    = {2006-02-13T09:34:51.000+0100},
   description = {},
   interhash   = {4572e706f2f1288bc170d149aa09d6c5}, 
   intrahash   = {4572e706f2f1288bc170d149aa09d6c5}
}