Kanbach, G. High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society;
Schwarz, R., Schwope, A. D., Vogel, J., Dhillon, V. S., Marsh, T. R., Copperwheat, C., et al. (2009). Hunting high and low: XMM monitoring of the eclipsing polar HU Aquarii. Astronomy & Astrophysics, 496(3), 833-840. doi:10.1051/0004-6361/200811485.