1. K.
Uchino
, Ferroelectric Devices, CRC, New York, 2000
2. B.
Jaffe
, W. R.Cook Jr. and H.Jaffe, Piezoelectric Ceramics, Academic, New York, 1971
3. Lead-free piezoceramics
4. EU-Directive 2002/95/EC: Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment (RoHS), Off. J. Eur. Union, 2003
5. “The Marking for Presence of the Specific Chemical Substances for Electrical and Electronic Equipment.” Japan Electronics and Information Technology Industries Association JISC, 2005