Dubus, B. ., J.-C. . Debus, and J. . Coutte. “Modelisation De Materiaux Piezoelectriques Et Electrostrictifs Par Ia Methode Des Elements Finis”. European Journal of Computational Mechanics, vol. 8, no. 5-6, May 1999, pp. 581-06, https://journals.riverpublishers.com/index.php/EJCM/article/view/2989.