S. C. Ruch-p, Evolution of Man's Needs and Technological Progression: Pragmatic Foundations for a Relational Coupling, Humane Interfaces: Questions of Methods and Practice in Cognitive Technology, p.293305, 1999.

S. C. Weaver-w, The Mathematical Theory of Communication, 1949.

W. P. Beavin, J. , and J. D. , Une Logique de la Communication, 1972.