Manullang, S., Sinaga, M. S., Sinambela, P. N. J. M. and Nadya, F. (2026) “SURVIVAL ANALYSIS OF CORONARY HEART DISEASE PATIENTS USING THE KAPLAN-MEIER METHOD AND COX PROPORTIONAL HAZARDS REGRESSION (BRESLOW METHOD)”, BAREKENG: Jurnal Ilmu Matematika dan Terapan, 20(3), pp. 2213-2228. doi: 10.30598/barekengvol20iss3pp2213-2228.