@electronic{www.bubbl.us,
   title       = {bubbl.us - free web application for brainstorming online}, 
   url         = {http://www.bubbl.us/},
   biburl      = {https://puma.uni-kassel.de/url/9e9f3af7f9572a3f360c584bb8934031/benz},
   keywords    = {brainstorm bubbl bubbl.us collaboration free mindmapping tool},
   added-at    = {2011-02-04T16:06:50.000+0100},
   description = {},
   interhash   = {9e9f3af7f9572a3f360c584bb8934031}, 
   intrahash   = {9e9f3af7f9572a3f360c584bb8934031}
}