1. T. R.Shrout S. J.Zhang R.Eitel C.Stringer andC. A.Randall “High Performance High Temperature Perovskite Piezoelectrics”; pp.126–9in 14th IEEE Int. Symp. Appl. Ferroelectr. ISAF‐04 IEEE 2004.
2. Lead-free piezoelectric ceramics: Alternatives for PZT?
3. Addition of a Sr, K, Nb (SKN) Combination to PZT(53/47) for High Strain Applications
4. RoHs RoHS Compliance Guide: Regulations 6 Substances Exemptions WEEE RoHS Guid.2015.
5. T.E.P.A.T.C.O.T.E. UNION DIRECTIVE 2011/65/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 8 June 2011 on the Restriction of the use of Certain Hazardous Substances in Electrical and Electronic Equipment.2011.