Ostermann, J., Vasudevan, L., Baumgartner, J. N., Ngadaya, E., & Mfinanga, S. G. (2019). Do mobile phone-based reminders and conditional financial transfers improve the timeliness of childhood vaccinations in Tanzania? Study protocol for a quasi-randomized controlled trial. Trials.

Ostermann, Jan, Lavanya Vasudevan, Joy Noel Baumgartner, Esther Ngadaya, e Sayoki Godfrey Mfinanga. "Do Mobile Phone-based Reminders and Conditional Financial Transfers Improve the Timeliness of Childhood Vaccinations in Tanzania? Study Protocol for a Quasi-randomized Controlled Trial." Trials 2019.

Ostermann, Jan, et al. "Do Mobile Phone-based Reminders and Conditional Financial Transfers Improve the Timeliness of Childhood Vaccinations in Tanzania? Study Protocol for a Quasi-randomized Controlled Trial." Trials 2019.