R. L. Mamabolo, N. P. Steyn, and M. Alberts, “Can the high prevalence of micronutrient deficiencies, stunting and overweight in children at ages 1 and 3 years in the Central Region of Limpopo province be explained by diet?”, SA J. Clin. Nut., vol. 19, no. 3, pp. 102–113, Nov. 2006.