1. Revised American Dental Association Specification No. 1 for Alloy for Dental Amalgam
2. B. Derby, D. Hills, and C. Ruiz(1992 ) In: Materials for Engineering - A Fundamental Design Approach . 1st. edn , pp.224 -225 . Longman Scientific and Technical, Harlow, U.K..
3. Physical and Chemical Properties and Wear