Jiajalernpong, K. “Treatment of Supraventricular Tachycardia During Pregnacy with Verapamil and Cardioversion : A case Report and Review Literature”. Srinagarind Medical Journal, vol. 13, no. 2, Nov. 2013, pp. 99-106, https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/14087.