1. Anand, S. and A.K. Sen (1997) ‘Concepts of Human Development and Poverty: a Multidimensional Perspective’, New York: UNDP. Human Development Papers.
2. Betti, G., B. Cheli and R. Cambini (2004) ‘A Statistical Model for the Dynamics Between Two Fuzzy States: Theory and an Application to Poverty Analysis’, Metron, 62, 391–411.
3. Betti, G., B. Cheli and V. Verma (2006) ‘On Longitudinal Analysis of Poverty Conceptualised as a Fuzzy State’, Society for the Study of Economic Inequality Working papers Series, ECINEQ WP 2006–32.
4. Betti, G., B. Cheli, A. Lemmi and V. Verma (2006) ‘On the Construction of Fuzzy Measures for the Analysis of Poverty and Social Exclusion’ Statistica & Applicazioni, 4 (1), 77–97.
5. Betti, G., A. D’Agostino and L. Neri (2002) ‘Panel Regression Models for Measuring Multidimensional Poverty Dynamics’, Statistical Methods and Applications, 11, 359–69.