Arrow relations on families of finite sets. - Mika Watanabe (Discret. Math., 1991)

Some best possible bounds concerning the traces of finite sets II. - Mika Watanabe (Graphs Comb., 1995)

No-Beacon GEDIR: Location-Based Ad-Hoc Routing with Less Communication Overhead. - Mika Watanabe; Hiroaki Higaki (ITNG, 2007)