Competitively orientable complete multipartite graphs. - Myungho Choi; Minki Kwak; Suh-Ryung Kim (Discret. Math., 2022)

The niche graphs of multipartite tournaments. - Soogang Eoh; Myungho Choi; Suh-Ryung Kim (Discuss. Math. Graph Theory, 2023)

Digraphs whose m-step competition graphs are trees. - Myungho Choi; Suh-Ryung Kim (Discret. Appl. Math., 2023)

Extensions of results on phylogeny graphs of degree bounded digraphs. - Myungho Choi; Suh-Ryung Kim (Discret. Appl. Math., 2024)

Generalized competitively orientable complete multipartite graphs. - Myungho Choi (Discret. Appl. Math., 2025)

A digraph version of the Friendship Theorem. - Myungho Choi; Hojin Chu; Suh-Ryung Kim (Discret. Math., 2025)

Digraphs in which every t vertices have exactly λ common out-neighbors. - Myungho Choi; Hojin Chu; Suh-Ryung Kim (Discret. Math., 2025)

The triangle-free graphs that are competition graphs of multipartite tournaments. - Myungho Choi; Minki Kwak; Suh-Ryung Kim (Discuss. Math. Graph Theory, 2025)