Unimodular Fans, Linear Codes, and Toric Manifolds. - Peter Kleinschmidt; Niels Schwartz; Bernd Sturmfels (Discrete and Computational Geometry, 1990)

Sheaves of Abelian l-groups. - Niels Schwartz (Order, 2013)

Spectral Reflections of Topological Spaces. - Niels Schwartz (Appl. Categorical Struct., 2017)

Bi-Condition of Existence for a Compatible Directed Order on an Arbitrary Field. - Niels Schwartz; YiChuan Yang (Symmetry, 2023)