1. Alexandre, C. (2010) 10 Things You Thought You Knew about M-PESA. http://www.cgap.org/blog/10-things-you-thought-you-knew-about-m-pesa .
2. Altamirano, M.A. (2010) Innovative Contracting Practices in the Road Sector. Delft: Technische Universiteit Delft.
3. Altamirano, M.A. (2017) A Financing Framework for Water Security. World Water Congress, Cancun, Mexico, Future Earth.
4. Baumüller, H. (2015) Agricultural Innovation and Service Delivery through Mobile Phones. Analyses in Kenya. Faculty of Agriculture, Doctoral dissertation, University of Bonn, Bonn.
5. Beck, T., Demirgüç-Kunt, A. and Martinez Peria, S. (2007) Reaching out: Access to and use of banking services across countries. Journal of Financial Economics 85(1): 234–266.