Hampshire, K., Mwase-Vuma, T., Alemu, K., Abane, A., Munthali, A., Awoke, T., Mariwah, S., Chamdimba, E., Owusu, S. A., Robson, E., Castelli, M., Shkedy, Z., Shawa, N., Abel, J., & Kasim, A. S. (2021). Informal mhealth at scale in Africa : opportunities and challenges. World Development, 140, Article 105257. https://doi.org/10.1016/j.worlddev.2020.105257