@electronic{addons.mozilla.org,
   title       = {BibSonomy Buttons :: Add-ons für Firefox}, 
   url         = {https://addons.mozilla.org/de/firefox/addon/bibsonomy-buttons/},
   biburl      = {https://puma.uni-kassel.de/url/57d690a9a15e1de7a0d8658290263aa8/stephandoerfel},
   keywords    = {addon bibsonomy buttons firefox},
   added-at    = {2012-09-21T19:42:17.000+0200},
   description = {},
   interhash   = {57d690a9a15e1de7a0d8658290263aa8}, 
   intrahash   = {57d690a9a15e1de7a0d8658290263aa8}
}

@electronic{www.absorb.it,
   title       = {Virtual Identity}, 
   url         = {https://www.absorb.it/virtual-id},
   biburl      = {https://puma.uni-kassel.de/url/2a33bd0ff8e65e1b3b9912b7e4931ae2/stephandoerfel},
   keywords    = {addon email from identity mozilla thunderbird virtual},
   added-at    = {2012-02-02T16:10:39.000+0100},
   description = {},
   interhash   = {2a33bd0ff8e65e1b3b9912b7e4931ae2}, 
   intrahash   = {2a33bd0ff8e65e1b3b9912b7e4931ae2}
}