Shimizu, T. Taro Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;
Liu, T., Koss, M., Blecha, L., Ricci, C., Trakhtenbrot, B., Mushotzky, R., et al. (2020). The BAT AGN Spectroscopic Survey. XVIII. Searching for supermassive black hole binaries in X-rays. The Astrophysical Journal, 896(2): 122. doi:10.3847/1538-4357/ab952d.