1. Amao, I. (2019). Urban Horticulture in Sub-Saharan Africa. Intech Open Book Series. DOI: 10.5772/intechopen.90722.
2. Barrett, C. B., Bachke, M. E., Bellemare, M. F., Michelson, H. C., Narayanan, S., and Walker, T. F. (2012). Smallholder Participation in Contract Farming: Comparative Evidence from Five Countries. World Development, 40(4), 715-730.
3. Chauvin, N.D, Mulangu F and Porto M.(2012). Food Production and Consumption Trends in Sub- Saharan Africa: Prospects for the Transformation of the Agricultural Sector. Working Paper. United Nations Development Programme. Regional Bureau for Africa.
4. European Union (2015) Value Chain Analysis of the Fruit and Vegetable Market for Smallholder Farmers in Zanzibar. Accessed on 10th March, 2018 from https://www.vsointernat io nal.org/s ites/default/files/VSO% 20Value%20Chain%20 Analysis% 20CASH. pdf.
5. Fernandez-Stark, K., Bamber, P. and Gereffi, G. (2011). The fruit and vegetables global value chain: Economic upgrading and workforce development. Center on Globalization, Governance & Competitiveness (CGGC), Duke University, North Carolina, USA.