Darmawan, Rahmat, and Riri Syafitri Lubis. 2023. “Survival Analysis of Patient Healing in Mental Disorders Using Kaplan Meier’s Method and Log-Rank Test”. Mathline : Jurnal Matematika Dan Pendidikan Matematika 8 (2):661-76. https://doi.org/10.31943/mathline.v8i2.428.