Bojowald, Martin Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;
Bojowald, M. (2006). Quantum Cosmology. In J.-P., Françoise, G., Naber, & T. S., Tsun (Eds.), Encyclopedia of Mathematical Physics Vol. 4 (pp. 153-158). Amsterdam u.a.: Elsevier / Academic Press.