A Topological Groupoid Representing the Topos of Presheaves on a Monoid. - Jens Hemelaer (Appl. Categorical Struct., 2020)

Noncommutative frames revisited. - Karin Cvetko-Vah; Jens Hemelaer; Jonathan Leech (Ars Math. Contemp., 2020)

Monoid Properties as Invariants of Toposes of Monoid Actions. - Jens Hemelaer; Morgan Rogers (Appl. Categorical Struct., 2021)

An Essential, Hyperconnected, Local Geometric Morphism that is not Locally Connected. - Jens Hemelaer; Morgan Rogers (Appl. Categorical Struct., 2021)