急求英文文献三篇！请设置成出售帖，谢谢！哈
1. Personal Income Tax Design for Italy: Lessons from the Theory [43.911%]

Claudio DE VINCENTI & Ruggero PALADINI (2009)

2. Personal Income Tax Theory, Equity and Incentives: Some Comments and Extensions [43.911%]

Alessandro PETRETTO (2009)

3. International Trends in Personal Income Tax: Some Aspects of Vertical;and Horizontal Equity [43.909%]

Ernesto LONGOBARDI (2009)