Sicilia, A., Lapi, A., Boco, L., Shankar, F., Alexander, D. M., Allevato, V., Villforth, C., Massardi, M., Spera, M., Bressan, A., & Danese, L. (2022). The Black Hole Mass Function across Cosmic Time. II. Heavy Seeds and (Super)Massive Black Holes. Astrophysical Journal, 934(1), https://doi.org/10.3847/1538-4357/ac7873