Ogwang, Tomson, and Baotai Wang. “A Modification of Silber’s Algorithm to Derive Bounds on Gini’s Concentration Ratio from Grouped Observations”. Statistica 64, no. 4 (January 1, 2004): 697–706. Accessed April 27, 2024. https://rivista-statistica.unibo.it/article/view/66.