1. The pure theory of public expenditure;Samuelson;Rev Econ Stat,1954
2. Diagrammatic exposition of a theory of public expenditure;Samuelson;Rev Econ Stat,1955
3. The new palgrave dictionary of economics;Samadi,1987
4. Innovation and incentives;Scotchmer,2006
5. Advancing public goods (the Cournot centre for economic studies series);Touffut,2006