1. Bairoch, P. (1988) Cities and Economic Development: From the Dawn of History to the Present. Chicago: University of Chicago Press.
2. Bairoch, P. (1997) Victoires et Déboires. Histoire Économique et Sociale du Monde du XVIe Siécle à Nos Jours. Paris: Editions Gallimard.
3. Behrens, K., C. Gaigné, G.I. P. Ottaviano and J. F. Thisse (2007) Countries, regions and trade: On the welfare impacts of economic integration, European Economic Review 51, 1277-1301.
4. Cipolla, C.M. (1962) The Economic History of World Population. Harmondsworth: Penguins.
5. Combes, P.P., T. Mayer and J. F. Thisse (2008) Economic Geography: The Integration of Regions and Nations, Princeton: Princeton University Press.