Collection Ingénium - L'Harmattan 2001 ISBN : 2-7475-1970-8 ? 304 pages
Ed. Afcet-Dunod. RIS Vol. 6, n° 4, 1992. pp. 289-461...
Volume V of the Santa Fé Institute Studies in the Sciences of Complexity, AddisonWesley Pub. Cy. N.Y. 1988. 317 p.