[1]
I. O. Lukovsky and A. N. Timokha, “Variational formulations of nonlinear boundary-value problems with a free boundary in the theory of interaction of surface waves with acoustic fields”, Ukr. Mat. Zhurn., vol. 45, no. 12, pp. 1642–1652, Dec. 1993, Accessed: Apr. 13, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/5972