1. Beatly T. Green urbanism: Learning from European cities.1st ed. Washington DC: Island Press; 2000.
2. OECD. Cities and climate change. 1st ed. OECD Publication; 2010.
3. FAO. Growing greener cities. Rome: FAO Publication; 2010.
4. Matuschke I. Rapid urbanization and food security: Using food density maps to identify future food security hotspots. Paper presented to International Association of Agricultural Economist Conference Beijing, August -19th; 2009.
5. Hubbard M and Onumah G. Improving urban food supply and distribution in developing countries: The role of city authorities. Habital International 2001; 25: 431-446.