Le Temps Editeur, 2011, ISBN 978 2 36312 004 5 , 188 pages
Editions Futuribles International, Paris, mai 1998. Etude n° 8. 88 pages.
Published by the Elmwood Institute, Berbeley, CA 94705. Edited by "Systems Education Research", Olympia, Wa 98502, first édition, winter 1990 104 pages.