Schlotterer, Oliver Quantum Gravity and Unified Theories, AEI Golm, MPI for Gravitational Physics, Max Planck Society;
1808.00713.pdf (Preprint), 316KB
JPA_52_045401.pdf (Publisher version), 2MB
Schlotterer, O., & Schnetz, O. (2019). Closed strings as single-valued open strings: A genus-zero derivation. Journal of physics A, 52(4): 045401. doi:10.1088/1751-8121/aaea14.