Werner Büttner, 1991, Message as Medium, museum in progress, Der Standard, 31-01-1991, pp. 20, 21, newspaper multiple
Werner Büttner, 1991, Message as Medium, museum in progress, Cash Flow, No. 2, 1991, p. 131, magazine multiple
Werner Büttner, 1991, Message as Medium, museum in progress, Der Standard, 31-01-1991, pp. 20, 21, newspaper multiple
Werner Büttner, 1991, Message as Medium, museum in progress, Cash Flow, No. 2, 1991, p. 131, magazine multiple