M. SZALEWSKI and M. WOLNA, “Thin piezoelectric layers of Pb(Zr,Ti)O3 obtained by the sol-gel method”, Arch. Acoust., vol. 22, no. 1, pp. 77–84, Jan. 2014, Accessed: Apr. 26, 2025. [Online]. Available: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/938