Debus, Jean Claude, Jocelyne Coutte, and Bertrand Dubus. “Non-Linear Analysis of Electrostrictive Materials by the Finite Element Method”. Canadian Acoustics 28, no. 3 (September 1, 2000): 34-36. Accessed May 6, 2021. https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1278.