Generalization of Bullen-Simpson's 3/8 inequality. - Marko Matic; Josip Pecaric; Ana Vukelic (Math. Comput. Model., 2005)

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

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