Text in book
Charles, Daniel. – «An ear alone is not a being». – Ars Electronica : facing the future : a survey of two decades. – Edited by Timothy Druckrey with Ars Electronica, foreword by Hannes Leopoldseder, preface by Gerfried Stocker and Christine Schöpf. – Cambridge : MIT Press, 1999. – (Electronic culture. History, theory, practice). – P. 188-189.