Rahmat, Basuki, et al. “Differences of Serum Ratio MMP-9 TIMP-1 in ST-Elevation Myocardial Infarction (STEMI) and Non ST-Elevation Acute Coronary Syndrome (NSTEACS)”. Indonesian Journal of Cardiology, vol. 34, no. 3, Mar. 2014, pp. 160-6, doi:10.30701/ijc.v34i3.337.