SHI, Huan-Nan; WU, Shan-He. A CONCISE PROOF OF A DOUBLE INEQUALITY INVOLVING THE EXPONENTIAL AND LOGARITHMIC FUNCTIONS. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 41, p. 284–289, 2019. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/7127. Acesso em: 27 oct. 2026.