Díaz, C. E., López, R., Herrera, I., Arena, D., Giraldo, C. and Gonzáles, L. (2011) “Factors associated with breastfeeding in children less than one year of age in the city of Cartagena, Colombia”, Colombia Medica, 42(2 supl 1), pp. 26–34. doi: 10.25100/cm.v42i2supl1.817.