Collection Ingénium - L'Harmattan 2001 ISBN : 2-7475-1970-8 ? 304 pages
Ed du Seuil, ISBN 2 02 051234 3, 2001, 150 pages.
Volume V of the Santa Fé Institute Studies in the Sciences of Complexity, AddisonWesley Pub. Cy. N.Y. 1988. 317 p.