Gonçalves, A.J., Carvalho, L.H. de, Serdeira, K., Nakai, M.Y. and Malavasi, T.R. 2007. Comparative analysis of the prevalence of the glutathione S-transferase (GST) system in malignant and benign thyroid tumor cells. São Paulo Medical Journal. 125, 5 (Sep. 2007), 289–291.