7Samuelson, Paul, 1954, The Pure theory of public expenditure [ J ] Review of Economics and Statistics 36,387 - 89.
8Samuelson, Paul, 1955 Diagrammatic exposition of the theory of public expenditure [ J ], Review of Economics and Statistics 37, Reprinted in R.W. Houghton, ed. , Public Finance, Penguin Books (1970).
