[2] Gaiger, Jason (2004). Post conceptual painting: Gerhard Richter's Extended Leave-taking in themes in contemporary art. In: Perry, Gillian and Wood, Paul eds. Themes in Contemporary Art. London: Yale University Press, pp. 89–135 نسخة محفوظة 2016-05-08 على موقع واي باك مشين.
[2] Gaiger, Jason (2004). Post conceptual painting: Gerhard Richter's Extended Leave-taking in themes in contemporary art. In: Perry, Gillian and Wood, Paul eds. Themes in Contemporary Art. London: Yale University Press, pp. 89–135 نسخة محفوظة 2016-05-08 على موقع واي باك مشين.