Euler's method for weighted integral formulae. - Josip Pecaric; Mihaela Ribicic Penava; Ana Vukelic (Appl. Math. Comput., 2008)

Sharp Integral Inequalities Based on a General Four-Point Quadrature Formula via a Generalization of the Montgomery Identity. - Josip Pecaric; Mihaela Ribicic Penava (Int. J. Math. Math. Sci., 2012)

Bounds for the Chebyshev functional and applications to the weighted integral formulae. - Josip Pecaric; Mihaela Ribicic Penava; Ana Vukelic (Appl. Math. Comput., 2015)