W. Ayach, R. A. A. Costa, I. de M. P. Calderon, and M. V. C. Rudge, “Comparison between 100-g glucose tolerance test and two other screening tests for gestational diabetes: combined fasting glucose with risk factors and 50-g glucose tolerance test”, Sao Paulo Med J, vol. 124, no. 1, pp. 4–9, Jan. 2006.