1. Assessment of departure from roundness, BS3730;British Standard,1987
2. Technical drawings-Geometrical tolerancing-Tolerancing of form, orientation, location and run-out-Generalities, definitions, symbols, indications on drawing, ISO 1101-1983(E);ISO,1983
3. Establishing reference figures for form evaluation of engineering surfaces;Shunmugam;J. Mfg. Syst.,1991
4. Minimum zone evaluation of surfaces;Murthy;Int. J. Mach. Tool Des. Res.,1980
5. An evaluation of roundness from minimum zone center by means of an optimization technique;Tsukada;Bull. Jap. Soc. Prec. Engng,1984