1. ENV 843-1. Monolitische Keramik Mechanische Eigenschaften bei Raumtemperatur. Teil 1: Bestimmung der Bruchzähigkeit; 1995.
2. Standard test method for flexural strength of advanced ceramics at ambient temperature;ASTM C1161,2013
3. Dentistry — polymer-based restorative materials;ISO 4049:2009,2010
4. Test methods for fracture toughness of advanced ceramics;ASTM C-1421-99,2002
5. Plastics — determination of fracture toughness (GIc and KIc) — linear elastic fracture mechanics (LEFM) approach;ISO 13586,2000