Nicolai, Hermann Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;
350989.pdf (Publisher version), 822KB
Aurilia, A., Nicolai, H., & Townsend, P. K. (1980). Hidden constants: The θ parameter of QCD and the cosmological constant of N = 8 supergravity. Nuclear Physics B, 176(2), 509-522. doi:10.1016/0550-3213(80)90466-6.