SCHRAG, H.; KRÄMER, W. A simple necessary and sufficient condition for the convexity of interpolated Lorenz curves. Statistica, [S. l.], v. 53, n. 2, p. 167–170, 1993. DOI: 10.6092/issn.1973-2201/931. Disponível em: https://rivista-statistica.unibo.it/article/view/931. Acesso em: 7 may. 2024.