Astuti, Y., and D. Tresnawan. “IMPLEMENTASI COX PROPORTIONAL HAZARD MODEL PARAMETRIK PADA ANALISIS SURVIVAL (Studi Kasus: Mahasiswa Universitas Internasional Batam)”. UJMC (Unisda Journal of Mathematics and Computer Science), Vol. 3, no. 1, June 2017, pp. 29-38, doi:https://doi.org/10.52166/ujmc.v3i1.457.