Nicolai, Hermann Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;
347082.pdf (Any fulltext), 919KB
Gebert, R. W., & Nicolai, H. (1995). E10 for beginners. In Strings and Symmetries (pp. 197-210). Berlin, Heidelberg: Springer.