-holonomy metrics connected with a 3-Sasakian manifold.
-natural metrics of constant curvature on unit tangent sphere bundles
We completely classify Riemannian -natural metrics of constant sectional curvature on the unit tangent sphere bundle of a Riemannian manifold . Since the base manifold turns out to be necessarily two-dimensional, weaker curvature conditions are also investigated for a Riemannian -natural metric on the unit tangent sphere bundle of a Riemannian surface.
Generalized plane wave manifolds
Generalized -space-forms
Generalized Symmetric Submanifolds of Euclidean Spaces.
Geodesic spheres and isometric flows
Geometric superrigidity.