@article{Lau2019,
author = {Lau, C Q. and Cronberg, A. and Marks, L. and Amaya, A.},
title= {In search of the optimal mode for mobile phone surveys in developing countries. A comparison of IVR, SMS, and CATI in Nigeria},
year = {2019},
volume = {13},
number = {3},
pages = {305--318},
}