@article{GDZPPN002113627, title = {Compact 8-manifolds with holonomy Spin (7).}, journal = {Inventiones mathematicae}, volume = {123}, year = {1996}, pages = {507-552}, zbl = {0858.53037}, url = {http://dml.mathdoc.fr/item/GDZPPN002113627} }
Joyce, D.D. Compact 8-manifolds with holonomy Spin (7).. Inventiones mathematicae, Tome 123 (1996) pp. 507-552. http://gdmltest.u-ga.fr/item/GDZPPN002113627/