Akinsha, Konstantin (17 September 2010). "Why Can't Private Art "Trophies" Go Home from the War?". International Journal of Cultural Property. 17 (27): 257–290. doi:10.1017/S0940739110000111. S2CID156663114.
Akinsha, Konstantin (17 September 2010). "Why Can't Private Art "Trophies" Go Home from the War?". International Journal of Cultural Property. 17 (27): 257–290. doi:10.1017/S0940739110000111. S2CID156663114.
the-athenaeum.org
The Athenaeum: Works at the Kunsthalle Bremen online retrieved 3 June 2012.