The number of edges of the edge polytope of a finite simple graph. - Takayuki Hibi; Aki Mori; Hidefumi Ohsugi; Akihiro Shikama (Ars Math. Contemp., 2016)

The number of $4$-cycles and the cyclomatic number of a finite simple graph. - Takayuki Hibi; Aki Mori; Hidefumi Ohsugi (Australas. J Comb., 2023)

Triangular faces of the order and chain polytope of a maximal ranked poset. - Aki Mori (Discret. Math., 2025)

Number of facets of symmetric edge polytopes arising from join graphs. - Aki Mori; Kenta Mori; Hidefumi Ohsugi (Eur. J. Comb., 2025)