RAKOTOMALALA, R. (1997): Graphes d'induction. Doctoral thesis presented at the Claude Bernard University- Lyon I, December 13.

--------------------------------- and ZIGHED, D. Les graphes d'induction. Paris: Ed. Hermes, 2000.

RITZER, G. Sociology: A Multiple Paradigm Science. Boston: Allyn and Bacon, 1980.

-------------------- : Towards an Integrated Sociological Paradigm. Boston: Allyn and Bacon, 1981.

THOM, R.: Stabilité structurelle et morphogénèse. Nova York: Benjamin, 1972. Spanish translated.: Estabilidad estructural y morfogénesis. Barcelona: Ed. Gedisa, 1987.

---------------- Modèles mathématiques de la morphogenèse. Paris: Christian Bourgeois Editeur, 1980a.

----------------- Parábolas y catástrofes. Barcelona: Tusquets Editores, Col. Metatemas,11, 1980b.

----------------- Prédire n’est pas expliquer. Paris: Ed. Flammarion, 1991.

Ernest Querol
Universitat Oberta de Catalunya
equerolp@campus.uoc.es