1. Mobile Phones and Economic.;J. C.Aker;The Journal of Economic Perspectives,2010
2. BBCAfrica. (2015). Kenya slum Mathare gets cheap water through ATMs. Available at: http://www.bbc.com/news/world-africa-33223922
3. Using mobile phone text messaging for malaria surveillance in rural Kenya.;SGithinji;Malaria Journal,2014
4. Global, P. (2015). Cell Phone Ownership Surges in Africa. Available at: http://www.pewglobal.org/2015/04/15/cell-phones-in-africa-communication-lifeline/africa-phones-7/
5. GSMA Intelligence. (2014). The Mobile Economy - Sub-Saharan Africa. London: GSMA.