The Hodge Conjecture for Fermat Varieties.
The Horrocks-Mumford Bundle and the Ferrand Construction.
The Irregularities of Hirzebruch's Examples of Surfaces of General Type with c21= 3c2 .
The moduli and the global period mapping of surfaces with : a counterexample to the global Torelli problem
The multiple conical surfaces.
The non-existence of a smooth sectionally non-special surface of degree 11 and sectional genus 8 in the projective fourspace.
The Normal Bundle of a Curve on a Quadric.
The Normalizer of the level (2,2)-Heisenberg Group.
The Picard group of a primary Kodaira surface.
The Shafarevich-Tate Conjecture for Pencils of Elliptic Curves on K3 Surfaces.
The smooth surfaces on cubic hypersurface in P... with isolated singularities.
The Tangent Bundle of a Ruled Surface.
The Tate conjecture for ordinary K3 surfaces over finite fields.
The topology of rational points.
The Two Most Algebraic K3 Surfaces.
Théorème de Torelli affine pour les intersections de deux quadriques.
Topologische Typen reeller kubischer Flächen.
Torelli theorem for surfaces with and ample and with certain type of automorphism
Torelli theorems for Kähler K3 surfaces
Translation manifolds and the converse of Abel's theorem