1. Axel Leijonhufvud, On Keynesian Economics and the Economics of Keynes: a study in monetary theory. New York, Oxford University Press, 1968, pp.42, 174, 280.
2. J.M.Keynes, The General Theory of Employment Interest and Money, London, Macmillan, 1936, pp.135-136.
3. Leijonhufvud, On Keynesian Economics, pp.41-42.
4. The Aggregative Structure of Keynes's General Theory
5. The Two-Sector General Theory Model