Pitahongnan, P., C. Phaloprakarn, S. Manusirivithaya, and B. Wiriyasirivaj. “Postpartum Glucose Intolerance in Gestational Diabetes Mellitus Women”. Thai Journal of Obstetrics and Gynaecology, vol. 17, no. 2, Apr. 2009, pp. 85-92, https://he02.tci-thaijo.org/index.php/tjog/article/view/7514.