Amsterdam, 25 January 1956 - Transport documents M. Winter's letter to Robert Giron, dated 25 January 1956
Amsterdam, 25 January 1956 - Institutional correspondence M. Winter's letter to Robert Giron, dated 25 January 1956
Artistic project, 7th Berlin Biennale for Contemporary Art, April 27 – July 1, 2012 - Website Occupy Biennale