Ooguri, Hirosi Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;
1004.0956 (Preprint), 110KB
ExpMath20_91.pdf (Any fulltext), 103KB
Eguchi, T., Ooguri, H., & Tachikawa, Y. (2011). Notes on the K3 Surface and the Mathieu group M_24. Experimental Mathematics, 20(1), 91-96. doi:10.1080/10586458.2011.544585.