Pfeiffer, Hendryk Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;
241770.pdf (Preprint), 14MB
topapp155-623.pdf (Verlagsversion), 2MB
Lauda, A. D., & Pfeiffer, H. (2008). Open-closed strings: Two-dimensional open-closed TQFTs and knowledgeable Frobenius algebras. Topology and its Applications, 155(7), 623-666. doi:10.1016/j.topol.2007.11.005.