Hayashida, M., Stawarz, Ł., Cheung, C. C., Bechtol, K., Madejski, G. M., Ajello, M., Massaro, F., Moskalenko, I. V., Strong, A., & Tibaldo, L. (2013). Discovery of GeV emission from the Circinus galaxy with the Fermi Large Area Telescope. The Astrophysical Journal, 779(2):, pp. 1-7. doi:10.1088/0004-637X/779/2/131.