STEFANOV, S. Nonexistence of orbital morphisms between dynamical systems on spheres. Ann. Sofia Univ. Fac. Math. and Inf., [S. l.], v. 83, n. 1, p. 123–128, 1992. Disponível em: https://ftl5.uni-sofia.bg/index.php/fmi/article/view/492. Acesso em: 5 dec. 2024.