Ed. les Editions d'Organisations, Paris, 1991, 304 p.
lntersystems Publications ( The systems inquiry series) Salinas, Cal. - USA, 1985, 116p.
Bruxelles, Bruylant, 1998, 378 p.
Editions Futuribles International, Paris, mai 1998. Etude n° 8. 88 pages.