Linear-Time FPT Algorithms via Network Flow. - Yoichi Iwata; Keigo Oka; Yuichi Yoshida (SODA, 2014)

Fast Dynamic Graph Algorithms for Parameterized Problems. - Yoichi Iwata; Keigo Oka (SWAT, 2014)

Reply trees in Twitter: data analysis and branching process models. - Ryosuke Nishi; Taro Takaguchi; Keigo Oka; Takanori Maehara; Masashi Toyoda; Ken-ichi Kawarabayashi; Naoki Masuda (Soc. Netw. Anal. Min., 2016)