4Castaldo, Adriana, Saskia Gent, Gunjan Sondhi, and Ann Whitehead. "Child Migration in National Surveys."(2009) Development Research Centre on Migration, Globalisation and Poverty Working Paper No. T-28.
11Kuiper, Marijke, Manda S Keita , and Bruno Barbier. Developing country impacts - Evaluating case studies.: System for Environmental and Agricultural Modelling; Linking European Science and Society (SEAMLESS), 2007.