YANG, G.-S.; LIU, S.-J. A simple proof of inequalities related to means. Tamkang Journal of Mathematics, [S. l.], v. 40, n. 4, p. 429–436, 2009. DOI: 10.5556/j.tkjm.40.2009.606. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/606. Acesso em: 26 apr. 2024.