Livre
Levy, Steven. – Crypto : how the code rebels beat the government : saving privacy in the digital. – New York : Viking, 2001. – 356 p.
Texte dans un périodique
O'Reilly, Sally. – «Sally O'Reilly offers an interpretation of morse code in art». – Contemporary. – n° 78 (Jan. 2006). – P. 56-57.
Livre
Kittler, Friedrich A. – Essays : literature media information systems. – Sous la direction de John S. Johnson. – Amsterdam : G+B Arts International, 1997. – 192 p. – (Critical voices in art, theory and culture).