The Canonical Reduction Method for Symplectic Structures and Its Applications. Neliniini Kolyvannya, [S. l.], v. 4, n. 3, p. 354–367, 2001. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/179. Acesso em: 22 jan. 2026.