Nicolai, Hermann Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;
206273.pdf (Publisher version), 364KB
Bärwald, O., Gebert, R. W., Günaydin, M., & Nicolai, H. (1998). Missing Modules, the Gnome Lie Algebra, and E10. Communications in Mathematical Physics, 195(1), 29-65. doi:10.1007/s002200050378.