Network Analysis of Three Twitter Functions: Favorite, Follow and Mention. - Shoko Kato; Akihiro Koide; Takayasu Fushimi; Kazumi Saito; Hiroshi Motoda (PKAW, 2012)

MDSR: An Eigenvector Approach to Core Analysis of Multiple Directed Graphs. - Shoko Kato; Kazumi Saito; Kazuhiro Kazama; Tetsuji Satoh (PRICAI, 2014)