Hohle, M. M. High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society;
Koeltzsch, A., Mugrauer, M., Raetz, S., Schmidt, T. O. B., Roell, T., Eisenbeiss, T., et al. (2009). Variability of young stars: determination of rotational periods of weak-line T Tauri stars in the Cepheus-Cassiopeia star-forming region. Astronomische Nachrichten, 330(5), 482-492. doi:10.1002/asna.200911204.