Observational Constraints on the Dependence of Radio-Quiet Quasar X-Ray Emission on Black Hole Mass and Accretion Ratev. 176355–373
Kelly, Brandon C., Bechtold, Jill, Trump, Jonathan R., Vestergaard, Marianne, and Siemiginowska, Aneta. 2008. "Observational Constraints on the Dependence of Radio-Quiet Quasar X-Ray Emission on Black Hole Mass and Accretion Rate." The Astrophysical Journal Supplement Series, 176 355–373.