Ecker, Lucie, et al. “Preferences of Antibiotic Use in Children Less Than Five in Physicians Working Health Centers of Primary Level in Peru-Urban Areas of Lima, Peru”. Revista Peruana De Medicina Experimental Y Salud Pública, vol. 30, no. 2, Feb. 2014, https://doi.org/10.17843/rpmesp.2013.302.189.