Rahmstorf, Stefan Potsdam Institute for Climate Impact Research;
Levermann, Anders Potsdam Institute for Climate Impact Research;
http://www.realclimate.org/index.php/archives/2017/06/why-global-emissions-must-peak-by-2020/ (Publisher version)
Rahmstorf, S., Levermann, A. (2017): Why global emissions must peak by 2020, (Why global emissions must peak by 2020)(RealClimate Blog), Washington, DC : Science Communication Network.