1. Einstein Manifolds;Besse,1987
2. Metrics with exceptional holonomy;Bryant;Ann. Math.,1987
3. Recent advances in the theory of holonomy, Séminaire Bourbaki Vol. 1998/99;Bryant;Astérisque,2000
4. On Riemannian manifolds with Spin7-structure;Cabrera;Publ. Math. Debrecen,1995
5. Classification of G2-structures;Cabrera;J. London Math. Soc.,1996