Hartinger, S.; Franco, C.; Hattendorf, J.; Wolf, J.; Gil, A. I.; Obando, M.;
NOBLEGA, M. S.; Verastegui, H.; Mausezahl, D.(2017).
Impact of a child stimulation intervention on early child development in rural Peru: a cluster randomised trial using a reciprocal control design. Journal of Epidemiology & Community Health. Volumen: 71. (pp. 217 - 224).