Text in periodical Klüver, Billy ; Martin, Julie. – «Four difficult pieces». – Art in America. – Vol. 79, no. 7 (July 1991). – P. 80-99 ; 138.
Archive document : File Stedelijk museum. – 1982. – Set of 2 elements. – File. – The person who processed the documents established the arrangement of items. – Includes one letter, one program.