@electronic{www.ibm.com,
   title       = {XML and Java technologies: Document models, Part 1: Performance}, 
   url         = {http://www.ibm.com/developerworks/xml/library/x-injava/index.html},
   biburl      = {https://puma.uni-kassel.de/url/af181983066e74d02ea85e35ccb57351/benz},
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@electronic{www.wikihow.com,
   title       = {How to Dramatically Speed up Windows XP - wikiHow}, 
   url         = {http://www.wikihow.com/Dramatically-Speed-up-Windows-XP},
   biburl      = {https://puma.uni-kassel.de/url/55fdafe33ae61a3de9cdb833100cbdec/benz},
   keywords    = {performance speedup tuning tweak win_xp windows xp},
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