ALOMARI, M. W. A sharp companion of Ostrowski’s inequality for the Riemann–Stieltjes integral and applications. Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica, [S. l.], v. 15, p. 69–78, 2016. Disponível em: https://studmath.uken.krakow.pl/article/view/13143. Acesso em: 31 oct. 2026.