Some language families generated by one-letter languages. - Yoshihide Igarashi; Shingo Osawa; Yukio Shibata (Inf. Sci., 1992)

Automorphisms of Broadcasting Schemes with Respect to Start Rounds. - Yoshihide Igarashi; Shingo Osawa; Walter Unger (Inf. Process. Lett., 1994)

Counting Closed Walks in Generalized de Bruijn Graphs. - Yukio Shibata; Miyuki Shirahata; Shingo Osawa (Inf. Process. Lett., 1994)

Broadcasting in Generalized de Bruijn Digraphs. - Yosuke Kikuchi; Shingo Osawa; Yukio Shibata (COCOON, 2002)

Broadcasting Multiple Messages Using Cycle-Rooted Trees. - Hiroaki Irino; Yuuki Tanaka; Hiroyuki Kawai; Shingo Osawa; Yukio Shibata (PDCAT, 2009)

On the distance preserving trees in graphs. - Toru Araki; Shingo Osawa; Takashi Shimizu (CoRR, 2014)