PEČARIĆ, J.; PERIĆ, I.; SMOLJAK, K. Generalized fractional Steffensen type inequalities. Eurasian Mathematical Journal, [S. l.], v. 3, n. 4, p. 81–98, 2012. Disponível em: https://emj.enu.kz/index.php/main/article/view/808. Acesso em: 9 oct. 2025.