1. Income inequality and nations' altruism
Enrico Materia, Lorenza Rossi, Gabriella Guasticchi 
The Lancet 
Volume 365, Issue 9469, Pages (April 2005)
DOI: /S (05)
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2. Figure
Correlation between official development assistance (ODA) as a percentage of gross national income (GNI) and Gini coefficient
The Lancet  , DOI: ( /S (05) )
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3. The Lancet 2005 365, 1462-1463DOI: (10.1016/S0140-6736(05)66410-0)
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