Simpson, J., Smail, I., Swinbank, A., Alexander, D., Auld, R., Baes, M., …van der Werf, P. (2012). The evolutionary connection between QSOs and SMGs: molecular gas in far-infrared luminous QSOs at z \tilde 2.5. Monthly Notices of the Royal Astronomical Society, 426(4), 3201-3210. https://doi.org/10.1111/j.1365-2966.2012.21941.x