Paulavičius, R., and Žilinskas, J. “Global Optimization Using the branch‐and‐bound Algorithm With a Combination of Lipschitz Bounds over Simplices”. Technological and Economic Development of Economy, Vol. 15, no. 2, June 2009, pp. 310-25, doi:10.3846/1392-8619.2009.15.310-325.