SHARKOVSKY, Alexander N. Iteration of continuous functions and dynamics of solutions for some boundary value problems. Annales Mathematicae Silesianae, [S. l.], v. 13, p. 243–255, 1999. Disponível em: https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/14153. Acesso em: 7 may. 2025.