BAGUL, Yogesh J.; CHESNEAU, Christophe. Some New Simple Inequalities Involving Exponential, Trigonometric and Hyperbolic Functions. CUBO, A Mathematical Journal, [S. l.], v. 21, n. 1, p. 21–35, 2019. DOI: 10.4067/S0719-06462019000100021. Disponível em: https://cubo.ufro.cl/index.php/cubo/article/view/2116. Acesso em: 11 oct. 2025.