@electronic{www.wolframalpha.com, title = {Wolfram|Alpha}, url = {http://www.wolframalpha.com/}, biburl = {https://puma.uni-kassel.de/url/3786f0247df1c232d1cca8b5572e41ff/hotho}, keywords = {alpha suchmaschinen wolfram}, added-at = {2009-11-02T08:44:53.000+0100}, description = {Computational Knowledge Engine}, interhash = {3786f0247df1c232d1cca8b5572e41ff}, intrahash = {3786f0247df1c232d1cca8b5572e41ff} }