MATEJÍČKA, L. Short note on convexity of power mean. Tamkang Journal of Mathematics, [S. l.], v. 46, n. 4, p. 423–426, 2015. DOI: 10.5556/j.tkjm.46.2015.1808. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/1808. Acesso em: 28 apr. 2024.