“A Case Report of Wellens’ Syndrome: An Ominous Sign of Left Anterior Descending Artery Critical Stenosis and Impending Anterior Myocardial Infarction”. Indonesian Journal of Medicine, vol. 5, no. 3, Aug. 2020, pp. 246-52, https://doi.org/10.26911/theijmed.2020.5.3.292.