1. S. Ruette, “Chaos on the interval,” Amer. Math. Soc., Ser. Univ. Lect., 67 (2017).
2. A. N. Sharkovsky, "On attracting and attracted sets," Dokl. Akad. Nauk SSSR, 160, No. 5, 1036-1038 (1965)
3. English translation: Soviet Math. Dokl., 6, 268-270 (1965).
4. A. N. Sharkovsky, "A classification of fixed points," Ukr. Mat. Zh., 17, No. 5, 80-95 (1965)
5. English translation: Amer. Math. Soc. Transl. Ser. 2, 97, 159-179 (1970).