The canonical eight form on manifolds with holonomy group Spin(9)

Article: 
The canonical eight form on manifolds with holonomy group Spin(9)
Authors: 
M. Castrillón López, P.M. Gadea, I. Mykytyuk
Journal: 
Int. J. Geom. Methods in Modern Physics
Volume: 
7(7)
Pages: 
1159-1183.
Year: 
2010
URL: 
http://arxiv.org/abs/0911.1079??