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«Seeing Double: Emulation in Theory and Practice opens at the Guggenheim March 19, 2004». – Fondation Daniel Langlois pour l'art, la science et la technologie = Daniel Langlois Foundation for Art, Science, and Technology. – Montréal : Daniel Langlois Foundation for Art, Science, and Technology. – English and French text. – Text written in 2004. {{www.fondation-langlois.org}}