ALSEDA, Lluís et al. Entropy and periodic points for transitive maps. In Transactions of the American Mathematical Society. - Providence : American Mathematical Society, 1999. ISSN 0002-9947, 1999, vol. 351, no. 4, pp. 1551-1573. Available on: https://doi.org/10.1090/S0002-9947-99-02077-2.