VASILIEVA, Ekaterina V. To the question of stability of periodic points of three-dimensional diffeomorphisms. Vestnik of Saint Petersburg University. Mathematics. Mechanics. Astronomy, [S. l.], v. 4, n. 2, p. 193–200, 2020. Disponível em: https://math-mech-astr-journal.spbu.ru/article/view/8591. Acesso em: 17 may. 2024.