de la Vega, Ma Casilda Lasso, and Ana Marta Urrutia. “An Alternative Formulation of the Esteban-Gradín-Ray Extended Measure of Polarization”. Journal of Income Distribution® 15, no. 1 (December 15, 2006): 42. Accessed March 29, 2024. https://jid.journals.yorku.ca/index.php/jid/article/view/498.