LUKOVSKY, I. O. Variational method for the solution of nonlinear boundary-value problems of the dynamics of bounded volumes of liquid with variable boundaries. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 70, n. 1, p. 63–78, 2018. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1542. Acesso em: 5 dec. 2025.