1. ISO 14253:2013 Geometrical product specifications (GPS) -- Inspection by measurement of workpieces and measuring equipment.
2. ISO 286-1:2010 Geometrical product specifications (GPS) -- ISO code system for tolerances on linear sizes -- Part 1: Basis of tolerances, deviations and fits.
3. ISO 286-2:2010 Geometrical product specifications (GPS) - ISO code system for tolerances on linear sizes - Part 2: Tables of standard tolerance classes and limit deviations for holes and shafts.
4. Selection of machining datum and allocation of tolerance through tolerance charting technique
5. G. Kaisarlis, Recent Adv. Appl. (2012).