Hohle, M. M. High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society;
Raetz, S., Mugrauer, M., Schmidt, T. O. B., Roell, T., Eisenbeiss, T., Hohle, M. M., et al. (2009). Planetary transit observations at the University Observatory Jena: XO-1b and TrES-1. Astronomische Nachrichten, 330(5), 475-481. doi:10.1002/asna.200811200.