Rahmstorf, Stefan Potsdam Institute for Climate Impact Research;
http://www.scilogs.de/klimalounge/obamas-state-of-the-union-zum-klima/ (Verlagsversion)
Rahmstorf, S. (2015): Obamas “State of the Union” zum Klima, (Obamas “State of the Union” zum Klima)(Climate Science Weblog KlimaLounge), Heidelberg : Spektrum der Wissenschaft.