Nicolai, Hermann Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;
351050.pdf (Verlagsversion), 313KB
Deser, S., & Nicolai, H. (1981). Achieving effective positive action in supergravity. Physics Letters B, 103(1), 25-28. doi:10.1016/0370-2693(81)90186-6.