Yasuhito Asano Hiroshi Imai Masashi Toyoda Masaru Kitsuregawa Web-Linkage Viewer: Finding Graph Structures in the Web. 441-442 2002 conf/waim/2002 WAIM http://dx.doi.org/10.1007/3-540-45703-8_41 db/conf/waim/waim2002.html#AsanoITK02