CASTILLO, Alvarado F. L.; LAWRYNOWICZ, J.; SUZUKI, O. Basic properties and applications of graded fractal bundles related to Clifford structures: An introduction. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 60, n. 5, p. 603–618, 2008. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3179. Acesso em: 7 apr. 2025.