Brightman, M. High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society;
Brightman, M., Baloković, M., Stern, D., Arévalo, P., Ballantyne, D. R., Bauer, F. E., et al. (2015). Determining the covering factor of compton-thick active galactic nuclei with NuStar. The Astrophysical Journal, 805(1): 41, pp. 1-16. doi:10.1088/0004-637X/805/1/41.