Lerdpienpitayakul, R., K. Russameecharoen, P. Wanitpongpan, and A. Phaophan. “Fetal Cardiac Function in Late First Trimester of Pregnant Women With Abnormal Glucose Challenge Test”. Siriraj Medical Journal, vol. 65, no. 5, Apr. 2017, pp. 132-6, https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/82338.