BARANNIK , L. F. Subalgebras of generalized extended Galileo algebra. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 40, n. 6, p. 705–709, 1988. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/9278. Acesso em: 5 dec. 2025.