Dahrizal, Dahrizal, et al. “Clinical Retrospective Cohort Study on the Effectiveness of Chitosan Zinc Oxide Cream for Accelerating Healing in Diabetic Ulcer Patients”. Poltekita: Jurnal Ilmu Kesehatan, vol. 19, no. 1, Apr. 2025, pp. 169-75, doi:10.33860/jik.v19i1.3793.