Shinsuke Nakajima, Junichi Tatemura, Yoichiro Hino, Yoshinori Hara, and Katsumi Tanaka: “Discovering Important Bloggers Based on Analyzing Blog Threads”, WWW2005 Workshop on the Weblogging Ecosystem, May 2005. http://www-idl.hpl.hp.com/blogworkshop2005/nakajima.pdf