The origins of active galactic nuclei obscuration: the 'torus' as a dynamical, unstable driver of accretionDOI: info:10.1111/j.1365-2966.2011.20035.xv. 420No. 1320–339
Hopkins, Philip F., Hayward, Christopher C., Narayanan, Desika, and Hernquist, Lars. 2012. "The origins of active galactic nuclei obscuration: the 'torus' as a dynamical, unstable driver of accretion." Monthly Notices of the Royal Astronomical Society, 420, (1) 320–339. https://doi.org/10.1111/j.1365-2966.2011.20035.x.