@electronic{portal.acm.org,
   title       = {Implicit interest indicators}, 
   url         = {http://portal.acm.org/citation.cfm?id=359836},
   biburl      = {https://puma.uni-kassel.de/url/7d8cef85840fc00a5f5611d1569a221f/stephandoerfel},
   keywords    = {implicit indicators info2.0 interest},
   added-at    = {2011-01-17T09:40:53.000+0100},
   description = {},
   interhash   = {7d8cef85840fc00a5f5611d1569a221f}, 
   intrahash   = {7d8cef85840fc00a5f5611d1569a221f}
}