Onayade, A., T. Abiona, I. Abayomi, and R. Makanjuola. “The First Six Month Growth and Illness of Exclusively and Non-Exclusively Breast-Fed Infants in Nigeria”. East African Medical Journal, vol. 81, no. 3, Aug. 2004, pp. 146-53, doi:10.4314/eamj.v81i3.9145.