Masaru Kitsuregawa Takayuki Tamura Masashi Toyoda Nobuhiro Kaji Socio-Sense: A System for Analysing the Societal Behavior from Long Term Web Archive. 1-8 2008 APWeb http://dx.doi.org/10.1007/978-3-540-78849-2_1 conf/apweb/2008 db/conf/apweb/apweb2008.html#KitsuregawaTTK08