V. V. Babenko, “Optimization of interval formulas for approximate integration of set-valued functions monotone with respect to inclusion”, Ukr. Mat. Zhurn., vol. 63, no. 11, pp. 1565–1569, Nov. 2011, Accessed: Apr. 13, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/2826