Hertling, Claus Max Planck Institute for Mathematics, Max Planck Society;
https://doi.org/10.1515/crll.2003.015 (Verlagsversion)
Hertling, C. (2003). tt* geometry, Frobenius manifolds, their connections, and the construction for singularities. Journal für die Reine und Angewandte Mathematik, 555, 77-161. doi:10.1515/crll.2003.015.