Invariant Submanifolds in Sasakian Manifolds.
Invariant submanifolds of codimension 2 of almost contact manifolds
Invariants in contact topology.
Isometric embedding of Kähler manifolds with nonpositive sectional curvature.
Isometric Immersions in Codimesion Two with Non Negative Curvature.
Isometric Immersions of Constant Curvature Manifolds.
Isometric Immersions of Lorentzian Space Forms.
Isometric Immersions of n-dim. Hyperbolic Spaces into (4n?3)-dim. Standard Spheres and Hyperbolic Spaces.
Isometric immersions of Riemannian products revisited.
Isometric Immersions of the Hyperbolic Plane into the Hyperbolic Space.
Isometric Immersions with the Same Gauss Map.
Isometric Reflections with Respect to Submanifolds and the Ricci Operator of Geodesic Spheres.
Isometrische Immersionen der Kodimension 2 von Raumformen.
Isoparametric and Dupin hypersurfaces.
Isoparametrische Hyperflächen in Sphären I.
Isoparametrische Hyperflächen in Sphären. II. Über die Zerlegung der Sphäre in Ballbündel.
Isothermic surfaces and Hopf cylinders.
Isotropic Totally Real Submanifolds.