フォルクヴァンク美術館
↑ http://www.saatchi-gallery.co.uk/museums/museum-profile/Museum+Folkwang,+Essen/396.html
↑ “History”. Folkwang-uni.de. 2010年8月24日閲覧。
↑ "Degenerate Art", Philadelphia Museum of Art, accessed 20 September 2010
↑ "Marc Chagall's Purim", Philadelphia Museum of Art, accessed 20 September 2010