Akpede, G. O., E. A. Solomon, I. Jalo, E. O. Addy, A. I. Banwo, and B. A. Omotara. “Nutritional Rickets in Young Nigerian Children in the Sahel Savanna”. East African Medical Journal, vol. 78, no. 11, Nov. 2001, pp. 568-75, doi:10.4314/eamj.v78i11.8945.