On a geometric property of the normal bundle of surfaces in IP4.
On a surface of the eighth order
On Affine-Ruled Irrational Surfaces.
On Affine-Ruled Rational Surfaces.
On algebraic tori of norm type.
On Almost Homogeneous Compact Complex Analytic Surfaces.
On automorphisms of Enriques surfaces.
On congruences of lines in the projective space (Chapter 6 written in collaboration with M. Pedreira)
On elementary transformations of ruled surfaces.
On Elliptic Surfaces in Characteristic p.
On Enriques Surfaces in Characteristic p. I.
On Eriques Surface as a Fourfold Cover of P2*
On Euler's quartic surface.
On Even surfaces of general type with
On Extremal Rational Elliptic Surfaces.
On Manifolds that Cannot be Ample Divisors.
On Open Algebraic Surfaces IP2 ? C.
On polarized normal surfaces.
On polarized surfaces with small generalized class.
On smooth surfaces in Gr(1, P3) with a fundamental curve.