%0 Journal Article %A Oldrich Kowalski %A Lieven Vanhecke %T Ball-Homogeneous and Disk-Homogeneous Riemannian Manifolds. %J Mathematische Zeitschrift %D 1982 %P 429-444 %V 180 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1982__180_173202/ %F MZ_1982__180_173202