1. Applications of Ostrowski's version of the Gr"{u}ss inequality for trapezoid type rules
2. Cerone P., Dragomir S. S., Trapezoidal-type Rules from an Inequalities Point of View, Handbook of Analytic-Computational Methods in Applied Mathematics, Editor: G. Anastassiou, CRC Press, New York, (2000), 65–134.
3. Cerone P., Dragomir S. S., Midpoint-type Rules from an Inequalities Point of View, Handbook of Analytic-Computational Methods in Applied Mathematics, Editor: G. Anastassiou, CRC Press, New York, (2000), 65–134.