H. I. Wedhana, A. Bakhtiar, E. Kusuma, and A. N. Rosyid, “Risk Factors of Death in Chronic Obstructive Pulmonary Disease (COPD) Patients at Dr. Soetomo General Academic Hospital, Surabaya, in 2019”, JUXTA, vol. 16, no. 1, pp. 14–20, Jan. 2025.