Brödel, Johannes Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;
Brödel, J., & Dixon, L. J. (2010). R-4 counterterm and E-7(7) symmetry in maximal supergravity. Journal of High Energy Physics, 2010(5): 003. doi:10.1007/JHEP05(2010)003.