On locally simply connected toposes and their fundamental groups
On some sheaves over a differential space
On state space representations of AR-models.
On the boundary value problem for the elliptic system of linear differential equations
On the characterization of monadic categories over set
On the derived category of sheaves on a manifold.
On the Geometry of Associated Sheaves
On the geometry of intuitionistic S4 proofs.
On the Grothendieck topologies in the toposes of presheaves