McAlpine, S., Bower, R. G., Rosario, D. J., Crain, R. A., Schaye, J., & Theuns, T. (2018). The rapid growth phase of supermassive black holes. Monthly Notices of the Royal Astronomical Society, 481(3), 3118-3128. https://doi.org/10.1093/mnras/sty2489