Pillarisetti A, Gill M, Allen T, Madhavan S, Dhongade A, Ghorpade M, Roy S, Balakrishnan K, Juvekar S, Smith KR. The Pink Key: a low-cost stove use monitor to enable conditional cash transfers. Ecohealth. 2018, 15: 768–776, doi.org/10.1007/s10393-018-1379-5