哥本哈根Nicolai Wallner畫廊
現藏者購自上述來源
Copenhagen, Galleri Nicolai Wallner, Christoph Ruckhäberle: Nye Eventyr, September 2–October 29, 2005
James Trainer, Hans-Werner Schmidt et al., Christoph Ruckhäberle: Die Flasche Bakbuk, Bielefeld, 2005, pp. 2, 31 (illustrated, p. 31)