M. Dukat and A. Zarycka, “Dielectric and piezoelectric properties of PZT type ceramics obtained by the sol-gel method”, Arch. Acoust., vol. 32, no. 4(S), pp. 65–70, Jan. 2014, Accessed: Apr. 26, 2025. [Online]. Available: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/1390