Hamiltonian formulation for the motion of a two fluid system with free surface. Neliniini Kolyvannya, [S. l.], v. 6, n. 1, p. 109–116, 2003. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/252. Acesso em: 22 jan. 2026.