Loll, Renate Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;
2782.pdf (Preprint), 120KB
Ambjörn, J., Jurkiewicz, J., & Loll, R. (2000). A non-perturbative Lorentzian path integral for gravity. Physical Review Letters, 85, 924-927.