Upper and lower bounds for the difference between the weighted arithmetic and harmonic operator means: doi:10.17398/2605-5686.34.1.41. Extracta Mathematicae, [S. l.], v. 34, n. 1, p. 41–60, 2019. Disponível em: https://revista-em.unex.es/index.php/EM/article/view/2605-5686.34.1.41.. Acesso em: 22 dec. 2024.