Rupitsch, Stefan Johann (2019), "Piezoelectricity", Piezoelectric Sensors and Actuators, Topics in Mining, Metallurgy and Materials Engineering, Berlin, Heidelberg: Springer Berlin Heidelberg: 43–81, doi:10.1007/978-3-662-57534-5_3, ISBN978-3-662-57532-1, retrieved 2021-05-05
Rupitsch, Stefan Johann (2019), "Piezoelectricity", Piezoelectric Sensors and Actuators, Topics in Mining, Metallurgy and Materials Engineering, Berlin, Heidelberg: Springer Berlin Heidelberg: 43–81, doi:10.1007/978-3-662-57534-5_3, ISBN978-3-662-57532-1, retrieved 2021-05-05