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4. Gaunet D. (1994) “Modèle formel de tolérancement de position. Contribution à l’aide au tolérancement des mécanismes et CFAO” (A formal model of position tolerancing-contribution to the aid of mechanism tolerancing and CAD — CAM) Ph. D thesis ISMCM ENS Cachan.
5. Clement A., Desrochers A.. Riviere A. (1991), “Theory and practice of 3-D tolerancing for assembly” CIRP International Working Seminar on Tolerancing pp 25–55