Rosenblit, J., Abreu, C.R., Szterling, L.N., Kutner, J.M., Hamerschlak, N., Frutuoso, P., Paiva, T.R.S.S. de and Ferreira Júnior, O. da C. 1999. Evaluation of three methods for hemoglobin measurement in a blood donor setting. São Paulo Medical Journal. 117, 3 (May 1999), 108–112.