SZALEWSKI, M., and M. WOLNA. “Thin Piezoelectric Layers of Pb(Zr,Ti)O3 Obtained by the Sol-Gel Method”. Archives of Acoustics 22, no. 1 (March 31, 1997): 77–84. Accessed March 4, 2026. https://acoustics.ippt.gov.pl/index.php/aa/article/view/938.