Lehners, Jean-Luc String Cosmology, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;
1701.05399.pdf (Preprint), 3MB
Bramberger, S. F., Hertog, T., Lehners, J.-L., & Vreys, Y. (in preparation). Quantum Transitions Through Cosmological Singularities.