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2. J.D. Meadows, Geometric Dimensioning and Tolerancing Handbook: Applications, Analysis & Measurement, ASME Press, New York, 2009.
3. P.J. Drake Jr., Dimensioning & Tolerancing Handbook, McGraw Hill, New York, 1999.
4. ADCATS website, http://adcats.et.byu.edu.
5. A.A.G. Requicha, Mathematical Definitions of Tolerance Specifications, Manufacturing Review, 6(4), 1993, pp. 269-274.