Haberl, F. High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society;
Mereghetti, S., Sartore, N., Tiengo, A., De Luca, A., Turolla, R., & Haberl, F. (2012). A study of the long term variability of RX J1856.5–3754 with XMM-Newton. In W. Lewandowski, O. Maron, & J. Kijak (Eds.), Electromagnetic Radiation from Pulsars and Magnetars (pp. 33-36).