@article{IM_1996__123_3_144358,
     author = {D.D. Joyce},
     title = {Compact 8-manifolds with holonomy {Spin} (7).},
     journal = {Inventiones mathematicae},
     pages = {507--552},
     year = {1996},
     volume = {123},
     number = {3},
     zbl = {0858.53037},
     url = {http://geodesic.mathdoc.fr/item/IM_1996__123_3_144358/}
}