Sierek, K. Aggregate states of iconic energy: Warburg's concept of image animism / Karl Sierek. Qual o tempo e movimento de uma elipse? : estudos sobre Aby M. Warburg ; [Colóquio Aby M. Warburg].(2012).
Παραπομπή σε μορφή Chicago (17η εκδ.)Sierek, Karl. "Aggregate States of Iconic Energy: Warburg's Concept of Image Animism / Karl Sierek." Qual O Tempo E Movimento De Uma Elipse? : Estudos Sobre Aby M. Warburg ; [Colóquio Aby M. Warburg].(2012) .
Παραπομπή σε μορφή MLA (8th εκδ.)Sierek, Karl. "Aggregate States of Iconic Energy: Warburg's Concept of Image Animism / Karl Sierek." Qual O Tempo E Movimento De Uma Elipse? : Estudos Sobre Aby M. Warburg ; [Colóquio Aby M. Warburg].(2012), .
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.