1. Testing coordinate measuring machine algorithms (Phase II);Drieschner,1991
2. Test von Software für Koordinatenmeβgeräte;Wäldele;VDI Z.,1991
3. ISO 1101, Technical drawings—Geometric tolerancing— Tolerancing of form, orientation, location and run-out— Generalities, definitions, symbols, indications on drawings.
4. BS 7172, British Standard guide to assessment of position, size and departure from nominal form of geometric features.
5. ISO 5459, Technical drawings—Geometric tolerancing— Datums and datum systems for geometric tolerances.