Differentiated Incentive Rewarding for Social Networking Services. - Kazufumi Yogo; Ryoichi Shinkuma; Tatsuro Takahashi; Taku Konishi; Satoko Itaya; Shinichi Doi; Keiji Yamada (SAINT, 2010)

Extraction of Hidden Common Interests between People Using New Social-Graph Representation. - Kazufumi Yogo; Akihiro Kida; Ryoichi Shinkuma; Tatsuro Takahashi; Hiroyuki Kasai; Kazuhiro Yamaguchi (ICCCN, 2011)

Incentive-rewarding mechanism to stimulate activities in social networking services. - Kazufumi Yogo; Ryoichi Shinkuma; Taku Konishi; Satoko Itaya; Shinichi Doi; Keiji Yamada; Tatsuro Takahashi (Int. J. Netw. Manag., 2012)