SAMOILENKO , V. Gr.; FIL , B. N. Algebras of symmetries of completely integrable dynamic systems. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 40, n. 2, p. 192–198, 1988. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/9115. Acesso em: 6 dec. 2025.