Dimensional reduction of conformal tensors and Einstein-Weyl spaces. Jackiw, Roman (2007) SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
Divisibility of the Dirac magnetic monopole as a two-vector bundle over the three-sphere. Ausoni, Christian, Dundas, Bjørn Ian, Rognes, John (2008) Documenta Mathematica