SULAIMAN, W. T. Extensions of Steffensen’s Inequality. Journal of Informatics and Mathematical Sciences, [S. l.], v. 4, n. 2, p. 249–254, 2012. DOI: 10.26713/jims.v4i2.89. Disponível em: http://rgnpublications.com/journals/index.php/jims/article/view/89. Acesso em: 4 dec. 2024.