1. African Union 2003 Maputo declaration on agriculture and food security: ten percent national budget allocation to agriculture development http://www.au.int/en/about/nutshell
2. African Union 2009 Investing in agriculture for economic growth and food security http://www.africa-union.org/root/au/conferences/2009/july/summit/13thsummit.html
3. Agricultural extension: good intentions and hard realities;Anderson;The World Bank Research Observer,2004
4. Climatic change and rural-urban migration: The case of sub-Saharan Africa;Barrios;Journal of Urban Economics,2006