QI, F. ON A TWO-PARAMETER FAMILY OF NONHOMOGENEOUS MEAN VALUES. Tamkang Journal of Mathematics, [S. l.], v. 29, n. 2, p. 155–163, 1998. DOI: 10.5556/j.tkjm.29.1998.4288. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4288. Acesso em: 19 apr. 2024.