Forbidden Configurations: Exact Bounds Determined by Critical Substructures. - Richard P. Anstee; Steven N. Karp (Electron. J. Comb., 2010)

Sign variation, the Grassmannian, and total positivity. - Steven N. Karp (J. Comb. Theory A, 2017)

Shelling the (m=1 ) amplituhedron. - Steven N. Karp; John M. Machacek (Comb. Theory, 2023)