Weibel, Peter. — «As far as in-between : Martin Kusch : absence and transparency». — Ars Electronica 94 : Intelligente Ambiente : Band 1 = Intelligent environment. — Wien : PVS Verleger, 1994. — Also in German under the title «Absenz und Transparenz». — ISBN 3901196110. — P. 78-81. Also available on the Internet : {{http://www.aec.at/en/archives/festival_archive/festival_catalogs/festival_artikel.asp?iProjectID=8722}} [ref. April 12, 2005].