1. Dimensioning and Tolerancing, ANSI Y14.5M-1994;American National Standards Institute,1994
2. Technical Drawing, Tolerances of Form and Position;ISO/DIS 1101,1972
3. Minimum Zone Evaluation of Surfaces;Murthy;Int'l Journal of MachineTool Design Research,1980
4. Comparison of Linear and Normal Deviations of Forms of Engineering;Shunmugam;Precision Engg.,1987
5. A Computational Geometry Approach to Geometric Tolerancing;Lai,1988