Lau, C. Q., Cronberg, A., Marks, L. and Amaya, A. (2019) “In Search of the Optimal Mode for Mobile Phone Surveys in Developing Countries. A Comparison of IVR, SMS, and CATI in Nigeria”, Survey Research Methods, 13(3), pp. 305-318. doi: 10.18148/srm/2019.v13i3.7375.