Bruxelles, Bruylant, 1998, 378 p.
Paris, LG.D.J., 1981, 466 p.
Ed. Grasset - Paris, 1992.
L' Edition Le Publieur, Paris, 2005, ISBN 2 7549 0003 9, 139 pages
Volume V of the Santa Fé Institute Studies in the Sciences of Complexity, AddisonWesley Pub. Cy. N.Y. 1988. 317 p.