Behrndt, Klaus Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;
50948.pdf (Preprint), 166KB
Behrndt, K., & Jeschek, C. (2003). Fluxes in M-theory on 7-manifolds and G structures. Journal of High Energy Physics, 2003(4): 002.