Augmenting trail theorem for the maximum 1-2 matching problem. - Hiroki Izumi; Sennosuke Watanabe; Yoshihide Watanabe (Discret. Math. Algorithms Appl., 2017)

The maximum 1-2 matching problem and two kinds of its variants. - Hiroki Izumi; Yuki Nishida 002; Sennosuke Watanabe; Yoshihide Watanabe (Discret. Math. Algorithms Appl., 2019)

Proposal of Captcha Using the Munker Illusion and Prototype Implimentation. - Yasuyuki Murakami; Kotaro Yamaguchi; Hiroki Izumi; Motonori Doi (ISITA, 2024)