MR 1772679 | Zbl 1014.53029 | 1 citation in Numdam

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[Wi] B. Wilking - On compact Riemannian manifolds with noncompact holonomy groups, 1999 preprint. URL: http://wwwmath.uni-muenster.de/math/inst/sfb/about/publ/wilking.ps | MR 1758296