1. Hanawa T (2010) Metals for medicine. The Japan Institute of Metals, Sendai
2. ISO22674 (2006) Dentistry―Metallic materials for fixed and removable restorations and appliances. International Organization for Standardization (ISO), Geneva, Switzerland
3. JIS T6113 (2011) Dental casting 14 K gold alloys. Japanese Industrial Standards Committee (JIS), Tokyo, Japan
4. JIS T6116 (2012) Dental casting gold alloys. Japanese Industrial Standards Committee (JIS), Tokyo, Japan
5. JIS T6106 (2011) Dental casting gold-silver-palladium alloys. Japanese Industrial Standards Committee (JIS), Tokyo, Japan