Sgarbieri, U. R., M. Fisberg, L. G. Tone, and M. do R. D. Latorre. “Nutritional Assessment and Serum Zinc and Copper Concentration Among Children With Acute Lymphocytic Leukemia: A Longitudinal Study”. São Paulo Medical Journal, vol. 124, no. 6, Nov. 2006, pp. 316-20, https://periodicosapm.emnuvens.com.br/spmj/article/view/2289.