Nicolai, Hermann Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;
351299.pdf (Publisher version), 396KB
Nicolai, H. (1987). The integrability of N=16 supergravity. Physics Letters B, 194(3), 402-407. doi:10.1016/0370-2693(87)91072-0.