Independent Spanning Trees of Product Graphs. - Koji Obokata; Yukihiro Iwasaki; Feng Bao 004; Yoshihide Igarashi (WG, 1996)

Independent Spanning Trees of Chordal Rings. - Yukihiro Iwasaki; Yuka Kajiwara; Koji Obokata; Yoshihide Igarashi (Inf. Process. Lett., 1999)