Collection Ingénium - L'Harmattan 2001 ISBN : 2-7475-1970-8 ? 304 pages
Paris, Ed. du Rocher, 1996, 232 p.
Published by the Elmwood Institute, Berbeley, CA 94705. Edited by "Systems Education Research", Olympia, Wa 98502, first édition, winter 1990 104 pages.
, éditions ENSP, Rennes, 2001, 272 pages.