A Toponogov splitting theorem for Lorentzian manifolds.- A survey on CR - Submanifolds of Kaehler...

On the minimal hypersurfaces of a locally symmetric manifold.- The spectral geometry of the lapla...

The conformal geometry of surfaces recently developed by the authors leads to a unified understan...

Zur Differentialgeometrie gewisser Bündel.- Die totale Absolutkrümmung.- Immersionen in den eukli...