Nicolai, Hermann Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;
354338.pdf (Verlagsversion), 397KB
Nicolai, H. (1976). Supersymmetry and spin systems. Journal of Physics A, 9(9), 1497-1506. doi:10.1088/0305-4470/9/9/010.