Abhijit Vinayak Banerjee, Esther Duflo, Rachel Glennerster, Dhruva Kothari
Banerjee A V, Duflo E, Glennerster R, Kothari D.
Improving immunisation coverage in rural India: clustered randomised controlled evaluation of immunisation campaigns with and without incentives
BMJ 2010; 340 :c2220
doi:10.1136/bmj.c2220