<hi xmlns="http://www.tei-c.org/ns/1.0" rend="bold">Lewens, Tim</hi> (2013): “Cultural Evolution”, in: <hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic">The Standford Encyclopedia of Philosophy</hi> (Spring 2013 Edition), Edward N. Zalta (ed.), URL <ref xmlns="http://www.tei-c.org/ns/1.0" target="http://plato.stanford.edu/archives/spr2013/entries/evolution-cultural/">http://plato.stanford.edu/archives/spr2013/entries/evolution-cultural/</ref> [letzter Zugriff 16. September 2017].