POLOVINA, O. I., KURYLIUK, V. V., & KOROTCHENKOV, O. A. (2009). Variational treatment of a vibrating LiNbO3-based rectangular hybrid structure: the developing of a functional for computing surface-load configurations. Archives of Acoustics, 34(2), 231–249. https://acoustics3.ippt.pan.pl/index.php/aa/article/view/578